While browning beef with onions, prepare potatoes according to directions plus add the extra 1/4 cup milk. Combine all ingredients into ... in place of beef.
For sauce, in a small saucepan, stir together milk, flour, salt, pepper, and ... half of the potatoes in the casserole. Top with ... until cheese is melted.
Ingredients: 9 (flour .. milk .. onion .. salt ...)
To make sauce, cook onion ... teaspoon pepper. Add milk. Cook and stir until ... of the sliced potatoes in a greased 2-quart casserole. ... into sauce until melted.