This Low Calorie Lasagna is just 320 calories per slice (1/4 of the casserole) and each slice has 15.8g of protein!You can boost the protein more by doubling the sausage!Special Tip: The calories are so low, because of the Low Calorie Marinara Sauce. You can use store-bought but it won't be as low in calories, or as good I'm sad to say.
To a large bowl, combine the crumbled sausage, zucchini, mushrooms, and mascarpone cheese. Mix together so the cheese covered all of the ingredients.
Spread 1/3 cup of marinara to the bottom of a 9x9 casserole dish.
Layer as follows: 2 lasagna sheets, 1/2 the sausage and veggie mixture, 2 lasagna sheets, 1/3 cup marinara sauce, the remaining sausage and veggie mixture, 2 lasagna sheets, and then the rest of the sauce. Finally cover the top with the mozzarella cheese.
Cover the lasagna with foil, and bake in the oven for 30 minutes. Uncover and bake for an additional 20 minutes.
Remove from the oven and let it rest for 20 minutes (this will keep it from falling apart).