Slice zucchini into 1/8″ thick slices, lightly salt and set aside or 10 minutes
After 10 minutes, blot excess moisture with a paper towel
Preheat a gas grill or grill pan to medium high, and grill 2 to 3 minutes per side
Preheat oven to 375F
In a medium sauce pan, add olive oil and saute garlic and onions about 2 minutes then brown ground turkey & season with salt
Add tomatoes, salt, and pepper - simmer on low for 30 minutes, covered
In a bowl mix ricotta cheese, parmesan cheese & egg
In a 9×12 casserole spread 1/2 of meat sauce on the bottom and layer the zucchini to cover. Spread 1/2 of the ricotta cheese mixture, then top with 1/2 of the mozzarella & repeat the process one more time
Cover with foil and bake 30 minutes & then uncover the foil and bake 20 minutes