Instant Pot Plant-based Protein-forward Weeknight Pasta

Lentil Bolognese Whole Wheat

Name: Lentil Bolognese Whole Wheat
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Yield: 4 servings
Cuisine: American
Ingredients: 2 tbsp Extra-virgin olive oil; 1 medium Yellow onion, finely chopped; 1 medium Carrot, finely chopped; 3 cloves Garlic, minced; 1 cup Dry brown lentils; 1 can (14 oz) Crushed tomatoes (14 oz can); 2 cups Vegetable broth (low-sodium recommended); 2 tbsp Tamari or soy sauce; 1 tsp Dried Italian seasoning; 12 oz Whole wheat spaghetti

A hearty, protein-forward plant-based bolognese made quickly in the Instant Pot, paired with whole wheat spaghetti for a satisfying weeknight dinner. Brown lentils give meaty texture while tomatoes and tamari build deep, savory flavor.

0.0(0 reviews)

Prep: 10m · Cook: 20m · Total30 mins

DifficultyMedium

Serves4

AuthorJake

Ingredient Spotlight

Tamari or soy sauce

Tamari is a Japanese-style soy sauce made as a byproduct of miso fermentation; it tends to be darker, richer, and smoother than many common Chinese-style soy sauces and is often produced without wheat (making it gluten-free). It has a pronounced umami/salty flavor but with less sharpness than regular soy sauce. You can find tamari in the Asian or gluten-free section of most supermarkets or at Asian markets; substitute with low-sodium soy sauce or coconut aminos if needed.

Jake's note

"This recipe shines as a cozy family dinner that still feels nutritious and filling. Home cooks will love how the Instant Pot turns simple pantry staples into a rich, meatless ragu in under 30 minutes."

Lentil Bolognese Whole Wheat

This Instant Pot Lentil Bolognese is built around two smart ideas: brown lentils for a satisfyingly meaty bite, and pressure cooking to get that texture fast. Browning the onion and carrot in olive oil and finishing with a hit of tamari gives the sauce a deep, savory backbone that mimics the umami you'd expect from long-simmered ragù. Crushed tomatoes provide body and brightness while mashing a portion of the lentils at the end creates a silky, clingy sauce that coats whole wheat spaghetti instead of sliding off it.

It’s a weeknight workhorse for anyone who wants plant-forward protein without a long stove watch. The all-in-one Instant Pot approach keeps cleanup minimal and lunch-box friendly: the flavors deepen in the fridge and leftovers reheat well. Whole wheat spaghetti adds nuttiness and fiber, and a splash of reserved pasta water helps the sauce bind and shine. This version is especially good for flexitarians, busy families, and anyone who appreciates a bowl that feels substantial yet straightforward to execute.

Plan your timing

Enter your target meal time:

6:25 pm–6:30 pm→Sauté the aromatics

6:30 pm–6:35 pm→Add lentils, tomatoes and seasonings

6:35 pm–6:40 pm→Pressure cook the ragu

6:40 pm–6:45 pm→Release and finish the sauce

6:45 pm–6:50 pm→Cook the whole wheat spaghetti

6:50 pm–6:55 pm→Toss and serve

Ingredients

Yield

Instructions

Sauté the aromatics

Set the Instant Pot to Sauté and heat the olive oil until shimmering. Add the chopped onion and carrot and cook, stirring occasionally, until softened and the onion is translucent, about 4–5 minutes; then add the minced garlic and sauté 30–60 seconds more until fragrant.

For this step

2 tbspExtra-virgin olive oil
1 mediumYellow onion, finely chopped
1 mediumCarrot, finely chopped
3 clovesGarlic, minced

Add lentils, tomatoes and seasonings

Pour in the dry brown lentils, crushed tomatoes, vegetable broth, tamari, and dried Italian seasoning. Stir well, scraping any browned bits from the bottom of the pot so nothing sticks, and make sure the lentils are submerged in liquid.

For this step

1 cupDry brown lentils
1 can (14 oz)Crushed tomatoes (14 oz can)
2 cupsVegetable broth (low-sodium recommended)
2 tbspTamari or soy sauce
1 tspDried Italian seasoning

Pressure cook the ragu

Secure the lid and set the Instant Pot to Manual/Pressure Cook on high for 8 minutes. Allow the pot to come to pressure and complete the cook cycle.

Release and finish the sauce

Perform a quick pressure release once the timer finishes and carefully open the lid. Stir the ragu and, if you prefer a thicker texture, mash a cup of the lentils against the side of the pot with the back of a spoon; taste and adjust with additional tamari or salt and pepper if desired.

Cook the whole wheat spaghetti

While the ragu is finishing, cook the whole wheat spaghetti in a large pot of boiling water according to package directions until al dente, then drain. For faster cleanup, you can break the spaghetti in half and cook directly in a wide skillet with a little reserved sauce and pasta water, but cooking on the stovetop is quickest.

For this step

12 ozWhole wheat spaghetti

Toss and serve

Toss the drained spaghetti with the warm lentil bolognese until evenly coated, adding a splash of pasta water if you want looser sauce. Serve immediately and enjoy warm — leftovers keep well refrigerated for 3–4 days and reheat beautifully.

Tips from the kitchen

Don’t skip browning

Sauté the onion and carrot until they’re nicely softened and beginning to brown; those caramelized bits contribute essential savory depth before you add the tomatoes and lentils.

Check lentil level

Make sure the lentils are fully submerged in liquid in the pot—if you see dry spots the bottom can scorch and trigger a burn error on the Instant Pot.

Mild texture control

For a meatier bite leave most lentils whole; for a saucier, creamier finish mash about a cup against the pot wall as instructed to thicken naturally.

Use reserved pasta water

Save 1/2 cup of starchy pasta water and add a splash when tossing; it helps the sauce emulsify and cling to the whole wheat spaghetti.

Adjust umami gradually

Add tamari in stages—start with the recipe amount and taste after pressure release, then add more to avoid over-salting and to round out the tomato acidity.

Variations & substitutions

Red wine boost

After sautéing the vegetables, deglaze the pot with 1/3 cup dry red wine before adding the tomatoes and broth for a richer, more ragu-like flavor.

Smoky lentil swap

Stir in 1–2 teaspoons smoked paprika and a splash of liquid smoke for a smoky, almost chorizo-like twist that pairs well with roasted red pepper salad.

Creamy cashew finish

For a creamier, protein-rich finish stir in 1/4 cup blended cashews or a dollop of plant-based cream after pressure cooking to mellow the acidity and add silkiness.

Gluten-free option

Swap the whole wheat spaghetti for brown rice or chickpea pasta and adjust the cooking time to the package instructions; toss with sauce as directed.

Storage & make-ahead

Cool the lentil bolognese to room temperature then store in an airtight container in the refrigerator for 3–4 days, or freeze up to 3 months in meal-sized portions. Reheat gently on the stovetop over medium-low heat with a splash of water or reserved pasta water to revive the sauce’s texture, or microwave in 1-minute bursts, stirring between intervals.

What to serve with it

Serve tossed with whole wheat spaghetti and finish with a drizzle of extra virgin olive oil and a scattering of fresh chopped parsley or basil for brightness. Offer grated Parmesan or a sprinkle of nutritional yeast at the table for optional savory richness, and pair with a simple peppery arugula salad and a crisp white wine or a citrusy IPA to cut through the tomato and tamari notes.

Frequently asked questions

Can I use green or black lentils instead?

Brown lentils hold up best here, but green lentils work as a substitute with similar texture; avoid red lentils as they break down into mush during pressure cooking.

What if my Instant Pot shows a burn warning?

Cancel, carefully release pressure if needed, open and stir to deglaze any stuck bits, add an extra 1/4 cup broth, and resume cooking; always scrape the bottom after sautéing to prevent residue.

Do I need to rinse the lentils?

Rinsing brown lentils briefly under cold water removes dust and any debris, and is a good habit, though it isn’t strictly required if they look clean.

How can I make this spicier?

Add crushed red pepper flakes during the sauté step or finish the dish with a drizzle of chili oil; a diced jalapeño sautéed with the onion and carrot also works well.

Can I cook the spaghetti in the Instant Pot with the sauce?

You can cook pasta in the Instant Pot using the sauté or pressure method, but timing is trickier with whole wheat spaghetti; stovetop cooking is simplest and gives the best al dente texture.

About the author

Jake

Hello, I'm Jake. I started this recipe site with the idea that I hated recipe websites that overwhelm you with long stories and ads just to see plain content that's not helpful. My goal is to provide you with quality recipes, simple ideas and a fun cooking experience. There's lots of fun things to cook, and I think as you browse the site you'll find that TopShelf.Recipes is the place for quality recipes on the web.

See all recipes by Jake →

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Ingredients

4 servings

Step 1: Sauté the aromatics

Extra-virgin olive oil2 tbsp
Yellow onion, finely chopped1 medium
Carrot, finely chopped1 medium
Garlic, minced3 cloves

Step 2: Add lentils, tomatoes and seasonings

Dry brown lentils1 cup
Crushed tomatoes (14 oz can)1 can (14 oz)
Vegetable broth (low-sodium recommended)2 cups
Tamari or soy sauce2 tbsp
Dried Italian seasoning1 tsp

Step 5: Cook the whole wheat spaghetti

Whole wheat spaghetti12 oz

Nutrition Facts

Per serving: about 2½ cups

Calories627

Total Fat14.5g

Saturated Fat2.7g

Trans Fat0g

Polyunsaturated Fat5.3g

Monounsaturated Fat3.1g

Total Carbohydrates104.4g

Dietary Fiber13.3g

Total Sugars5.2g

Protein21.5g

Nutrition values are estimated from USDA ingredient data and may vary based on preparation, brands, and portion sizes. Values are provided for informational purposes only.

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