Scalloped Tuna And Potato Casserole - cooking recipe

Ingredients

2 c. sliced, peeled potatoes
3 Tbsp. margarine
1/4 c. all-purpose flour
2 Tbsp. prepared mustard
1 tsp. salt
1/8 tsp. pepper
2 c. milk
1 (7 oz.) can tuna
1 c. sliced peeled onions

Preparation

Cook potatoes in boiling, salted water 10 minutes and drain. Melt margarine; stir in flour, mustard, salt and pepper.
Add milk gradually while stirring.
Cook over low heat until smooth and thickened.
Arrange potatoes, tuna and onions in alternate layers in greased 2-quart casserole dish.
Pour sauce over and bake at 350\u00b0 for 45 minutes.