Baked Ziti Pesto

This is easy, and one of my hubby's favorites!

8 oz. ziti pasta
1 cup ricotta cheese
1 1/2 cups mozerella cheese
1/2 cup parmesan cheese
1/4 cup prepared pesto
2 cups crushed tomatos
1 small onion diced
2 cloves garlic minced
2 Tbs. olive oil
Cook ziti for 7 min. then rinse with cold water.
Saute garlic and onion in olive oil and add crushed tomatos. Simmer 10 min.
In a medium size bowl combine:ricotta, 1 cup mozerella, parmesan, and pesto. Mix well
In a 8x9 pan layer: 1/2 of tomato sauce, half of ziti noodles, all of cheese mixture, the remaining half of ziti, the remaining tomato sauce, and 1/2 cup mozerella. Bake at 350 for 30 min.