Three Cheese Baked Ziti

Preheat oven to 350 degrees F.

In a large saucepan, melt butter, add onion, saute until tender. Add instant bouillon, stir until dissolved. Stir in flour to make a roux. Cook for 1 to 2 minutes until browned.

Slowly whisk in milk, until no lumps are apparent. Add all 3 cheeses (grated), stir over low heat until completely melted.

Put cooked pasta into a 2 quart casserole dish and pour sauce over. Sprinkle with bread crumbs (and additional Parmesan cheese if desired). Bake 30 to 40 minutes, or until brown and bubbly.