Scalloped Potatoes - cooking recipe

Ingredients

1/3 c. margarine
1/2 c. minced onion
1/3 c. flour
3 c. milk
2 1/2 c. grated Cheddar cheese
1 Tbsp. salt
1/4 tsp. dry mustard
1/8 tsp. pepper (black)
10 c. thinly sliced potatoes
1/4 tsp. paprika

Preparation

In medium saucepan, melt margarine.
Add onion and saute until soft.
Stir in flour.
Cook over low heat for 1 minute.
Gradually add milk, stirring constantly.
Cook over medium heat until slightly thickened and begins to boil.
Add 1 cup cheese, salt, mustard and pepper.
Remove from heat; stir until cheese is melted.