4-5 medium zucchini sliced lengthwise into 1/8-inch slices (s finely diced 2 medium garlic cloves, minced 1 tablespoon thyme leaves, chopped 2 1/2 cups marinara sauce (see notes) 15 ounces ricotta cheese (i used part-skim) 3 large eggs, lightly beaten 1 1/2 cup freshly grated parmesan cheese, divided 2 cups sh