Microwave Scalloped Potatoes
["3 Tbsp. butter", "2 Tbsp. flour", "1 tsp. salt", "1/4 tsp. pepper", "3 c. milk", "4 c. thinly sliced white potatoes", "2 Tbsp. minced onion"]
["Place butter in 1-quart casserole dish; microwave at High for 1/2 minute until melted.", "Blend in flour and seasonings. Gradually stir in milk; microwave at High for 8 to 10 minutes, stirring every 3 minutes.", "Stir in potatoes and onion.", "Cover. Microwave at High for 17 to 19 minutes, stirring after 10 minutes. Remove from heat and let stand for 5 minutes before serving."]
["butter", "flour", "salt", "pepper", "milk", "white potatoes", "onion"]