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Slow-Cooker Vegetarian Lasagna

Slow-Cooker Vegetarian Lasagna

Sure, the slow cooker’s great for stews and soups, but it also happens to make a mean lasagna! In this ingenious slow-cooker recipe, all you have to do is chop your veggies, then layer the ingredients (raw) into the crockpot. Serve with: Garlic bread and a green salad.


8 servings

Prep Time

30 minutes

Total Time

2 hours on High or 4 hours on Low


  • 1large egg
  • 115- to 16-ounce container part-skim ricotta
  • 15-ounce package baby spinach, coarsely chopped
  • 3large portobello mushroom caps, gills removed, halved and thinly sliced
  • 1small zucchini, quartered lengthwise and thinly sliced
  • 128-ounce can crushed tomatoes
  • 128-ounce can diced tomatoes
  • 3cloves garlic, minced
  • Pinch of crushed red pepper (optional)
  • 15whole-wheat lasagna noodles (about 12 ounces), uncooked
  • 3cups shredded part-skim mozzarella, divided


  1. Combine egg, ricotta, spinach, mushrooms and zucchini in a large bowl.
  2. Combine crushed and diced tomatoes and their juice, garlic and crushed red pepper (if using) in a medium bowl.
  3. Generously coat a 6-quart or larger slow cooker with cooking spray. Spread 1 1/2 cups of the tomato mixture in the slow cooker. Arrange 5 noodles over the sauce, overlapping them slightly and breaking into pieces to cover as much of the sauce as possible. Spread half of the ricotta-vegetable mixture over the noodles and firmly pat down, then spoon on 1 1/2 cups sauce and sprinkle with 1 cup mozzarella. Repeat the layering one more time, starting with noodles. Top with a third layer of noodles. Evenly spread the remaining tomato sauce over the noodles. Set aside the remaining 1 cup mozzarella in the refrigerator.
  4. Put the lid on the slow cooker and cook on High for 2 hours or on Low for 4 hours. Turn off the slow cooker, sprinkle the reserved mozzarella on the lasagna, cover and let stand for 10 minutes to melt the cheese.


Tip: The dark gills found on the underside of a portobello mushroom cap are edible, but can turn a dish an unappealing gray color. If you like, gently scrape the gills off with a spoon.

Nutrition Facts

Per serving (recipe makes 8 servings)

Calories 414kcal
Carbohydrate Total 48g
Added Sugars 0g
Fiber 7g
Total Fat 14g
Saturated Fat 8g
Mono Saturated Fat 4g
Cholesterol 63mg
Sodium 641mg
Protein 28g
Potassium 829mg
Calcium 563mg
Folate 70mcg
Omega-6 1g
Vitamin E 3mg
Zinc 4mg
Vitamin B3 4mg

© Meredith Operations Corporation. All rights reserved. Used with permission.