Traditional Baked Ziti - Mama Mancini's

Ingredients

• 1 lb ziti
• 1 lb shredded mozzarella
• 3/4 cup grated pecorino romano cheese
• 2-28 oz cans of whole Italian plum tomatoes, crushed by hand
• 1 lb of ricotta cheese, liquid drained
• 1 tsp salt
• 1/2 cup chopped onion
• 2 garlic cloves sliced
• 2 tbsp olive oil
• 2 tbsp butter