Spinach baked penne

This is a great hearty winter dish, that can be made from standard pantry/freezer ingredients.

3-4 links hot or sweet Italian sausage
4 minced cloves garlic
2 chopped onions
1 28 oz can tomatoes
½ cup pesto (optional)
1 package penne or ziti
1 box frozen spinach, thawed
2 cups shredded mozzarella
1 cup parmesan

Squeeze sausage out of casings and brown in skillet, breaking apart. Add garlic and onion, cook 2 minutes. Stir together, cook until sausage is cooked through. Drain sausage, add tomatoes and liquid. Cook on low 10 minutes. Add pesto, stir. Cook pasta until al dente, drain, put in large bowl. Add spinach, mozzarella and half of parmesan, stir. Add tomato mix, stir. Pour all into greased 9 x 13 baking dish. Sprinkle remaining parmesan on top. Bake at 350 30-35 minutes.

This will feed two people for at least two days (lunch and dinner).