Pasta with Bolognese Sauce

1 pound ground sirloin
1 cup diced onion
1 tablespoon minced fresh garlic
1 carrot, shredded
1 tablespoon dried oregano
1 1/2 teaspoon salt
1/2 teaspoon pepper
1 bay leaf
42 oz canned crushed San Marzano tomatoes
2 cups water
8 oz ziti
2 tablespoon butter
1 cup grated fresh Parmesan cheese

Heat a large pot over high heat.  Brown beef with onion, garlic and carrot.  Drain and then return to pot.  Add oregano, salt, pepper and bay leaf.  Stir in the tomatoes and water.  Bring to a boil, then reduce heat to medium-low and continue to simmer for 1 to 1 1/2 hours. 

Cook pasta according to package directions and drain.  Stir butter and Parmesan cheese into sauce and then serve with pasta.  Freeze remaining sauce in airtight container.

Serve with mixed green salad and fresh Italian bread.