Mac n Cheese with ham

Great way to use up leftover ham.  We had leftover cheese cubes from a cheese tray too so I used those in this also...love using up everything with no waste!!  This came from about.com originally.

6 tbsp butter
4 tbsps. flour
1 3/4 cups of half and half
2 1/2 cups shredded cheese (I used half swiss and half cheddar to use up what I had but I wanna use all cheddar next time!)
1/2 cup Parmesan cheese
3 cups of diced ham
5 cups cooked macaroni
1 cup bread crumbs - half for the inside crunch and half for a topping
1/4 cup scallions, diced
pepper to taste

Using a large saucepan melt the butter and add the flour – stir and gradually stir in your half and half making sure to keep stirring as the entire mixture thickens.

Pour in your cooked macaroni. Add your shredded cheese and your Parmesan to the mixture - add half the bread crumbs and scallions, and add the cubes of ham.

Stir well and pour into a well greased casserole or baking dish.

Put the last of the bread crumbs on the top for a nice crunchy top layer. Bake at 350 degrees about 20 minutes or until the top is crisp.