3 homemade low fat marinara sauce Recipes

water , salted, baby spinach, washed (5 1/4 oz bag), low-fat ricotta cheese (15 oz container), fresh flat-leaf parsley, chopped, lemon , zest of, parmesan cheese, freshly grated, divided, russet potatoes, peeled and cut into rectangular blocks (2 large), butter, marinara sauce, homemade or 2 cups marinara sauce, purchased, salt and pepper, to taste

salt, uncooked thin spaghetti, broken in half, eggs, egg whites, water or 1% low-fat milk, salt, black pepper, asparagus spears, trimmed, olive oil, butter, sliced mushrooms, coarsely chopped, chopped onion, minced garlic, chopped fresh basil, chopped fresh oregano, shredded asiago or parmesan cheese, bottled or homemade marinara sauce