• 4 medium potatoes
  
• 1 1/2 cups vegan soymilk
  
• 2 tablespoons flour
  
• 1 teaspoon salt (or seasoned salt)
  
• 1/2 to 1 teaspoon garlic powder
  
• 1/2 to 1 teaspoon cayenne pepper
  
• 1 medium onion, chopped
  

Peel and slice potatoes thinly. In a saucepan, combine soy
milk, flour, salt, garlic powder and cayenne pepper and cook
over medium heat until sauce thickens. Add onions to sauce.

Layer casserole dish with half of potato slices. Spoon half of
sauce over slices and repeat with remaining potatoes and sauce.
Cover and bake in preheated oven at 350 degrees for 65
minutes.

(I tried this with both skim milk and soy milk. The sauce
was richer with soy milk and probably had more fat, but it
thickened nicely and had a good flavor.)