3 tbsp. butter
2 tbsp. flour
1 tsp. salt
1/4 tsp. pepper
3 c. milk
4 c. thinly sliced white potatoes (about 3 med.)
2 tbsp. minced onion

In a 1 quart glass casserole dish, place butter. Microwave on high 1/2 minute or until melted. Blend in flour and seasonings. Gradually stir in milk. Microwave on high for 8 to 10 minutes, stirring every 3 minutes.

Layer half of the potatoes, onion and sauce in greased 3-quart casserole. Repeat layers. Cover. Microwave on high 17 to 19 minutes stirring after 10 minutes. Remove from oven and let stand 5 minutes before serving.