Cheesy Scalloped Potatoes

½ stick of butter
2 T flour, heaping
3 c. milk
1 lb. chopped Velveeta cheese
10 large potatoes

Melt butter – add flour. Add milk, salt & pepper, continuously stirring. Add chopped Velveeta cheese. Continue to stir until melted. In a separate pot, slice potatoes and boil until tender. Drain potatoes and place into 9 x 13 pan. Pour melted cheese over the potatoes; do not stir. Bake at 350 for 20 mins or until edges begin to brown.