Ingredients
- 2 pounds zucchini (about 4 medium), cut lengthwise into ¼-inch slices
- 15 ounces low-fat ricotta
- 10 ounces frozen chopped spinach, thawed and squeezed dry
- ½ cup grated Parmesan (2 ounces), divided
- 1 large egg, lightly beaten
- Coarse salt and pepper
- 7 cups marinara sauce, divided
- 15 no-boil lasagna noodles (¾ pound total)
- 1 cup shredded part-skim mozzarella (4 ounces), divided
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