Tuna Noodle Casserole

2 cups dry macaroni
2 cans tuna, drained
4 oz shredded cheddar
1/2 red onion
1 1/2 cups water
1/2 cup dry milk powder
2 T. butter
2 T. flour
1 can peas, drained
bread crumbs (from heels of old bread)
salt, pepper, garlic powder to taste

1. Cook the macaroni til almost done, drain.
2. Saute onion in butter until soft. Add flour to make a roux. Cook for a few minutes.
3. Mix the dry milk powder with water (you could just use milk). Add to roux, stirring slowly.
4. When it thickens, add drained peas and tuna, cheese, and salt and pepper to taste.
5. Add macaroni and stir.
6. Pour into greased casserole dish. Cover with breadcrumbs. Bake at 350F for 30 min.