Scalloped Potatoes - cooking recipe

Ingredients

1/4 c. chopped onion
2 Tbsp. margarine or butter
2 Tbsp. all-purpose flour
1 1/4 c. milk
3 medium potatoes, peeled and thinly sliced (3 c.)
salt
pepper

Preparation

For Sauce:
Cook onion in margarine until tender.
Stir in flour, 1/2 teaspoon salt and 1/8 teaspoon of pepper.
Add milk all at once.
Cook and stir until thick and bubbly.
Remove from heat.