Ingredients (13)

1 lb 93% lean ground beef

1 1/2 teaspoons kosher salt

1 tsp olive oil

1/2 large onion chopped

3 cloves garlic minced

1 28 oz can crushed tomatoes

2 tbsp chopped fresh basil

black pepper to taste

3 medium 8 ounces each zucchini, sliced 1/8" thick

1 1/2 cups part-skim ricotta

1/4 cup Parmigiano Reggiano

1 large egg

16 oz 4 cups shredded part-skim mozzarella cheese