If you want to skip meat altogether, replace the cooked meat with a 10- to 12-ounce bag of frozen spinach (thawed and squeezed dry) or a few cups of chopped fresh spinach layered in with the cheese.
Picky eaters might like it plainer—use a smooth marinara without chunks and stick to mozzarella only. If your crew loves extra cheese, sprinkle an additional 1/2 cup of mozzarella over the top during the last 30 minutes of cooking. You can also stir a teaspoon of dried Italian seasoning into the ricotta
