Go4 Girl's Scallop Potatoes

Ingredients:​
Potatoes
6 Yukon Gold potatoes
1 Small onion sliced
 
Sauce
¼ cup butter
¼ cup all-purpose flour
1 tsp salt
½ tsp pepper
½ tsp pepper
½ tsp dried thyme or marjoram
2 ½ cups milk
 
Directions:
Sauce
In saucepan, melt butter over medium heat. Add flour, salt, pepper and thyme; cook, stirring for 1 minute. Gradually whisk in milk; cook, whisking constantly for 5 to 8 minutes or until boiling and thickened. Set aside.

Potatoes
Peel and thinly slice potatoes. Layer one-third in greased 8” (2 L) square glass baking dish or casserole; spread half of the onions over top. Repeat layers. Arrange remaining potatoes over top. Pour sauce over top. Cover and bake in 350 degrees F oven for 1 hour. Uncover and bake for 30 minutes longer or until lightly browned and potatoes are tender. Let stand for 5 minutes before serving.