4 medium potatoes, peeled and cut into 1" cubes
1 large onion chopped
3 cups water
salt
pepper
2 tbsp butter
2 cups milk
1 tbsp flour
Boil potatoes, onions, butter, water, salt and pepper uncovered until potatoes are tender. Add milk and flour.
Simmer until thickened. You can adjust the amount of butter to taste.