Scalloped Tuna

Tuna Potato Scallop

Easy Tuna scallop with potatoes and other ingredients...it's actually pretty good. If you don't like mustard (which I don't) there's hardly any taste of it. I actually made enough to bake it in a 9 x 13 pan and it was soo good. I'm not sure if you can freeze this, but I did so we'll see how it turns out.

5 medium potatoes, cooked and sliced (I didn't cook mine too much, and they were still tender)
3 Tbsp butter
1/4 C flour
1 tsp salt
1/8 tsp pepper
1 1/2 Tbsp prepared mustard
2 C milk
1 can (7 oz) tuna, drained
1 C chopped onion

Melt butter in a saucepan; blend in flour and seasonings. Gradually add milk. Cook over low heat, stirring until thick. Arrange potatoes, tuna, and chopped onion in a greased 1 1/2-quart casserole; add sauce. Bake at 350° for 50 to 60 minutes.

Scalloped Tuna serves 4 to 6.