Mustard Cream Sauce for Crab Cakes

I use this simple mustard cream sauce
on crab cakes, seafood and steaks.
It's kind of a kicked up white sauce.

Ingredients:
2 tablespoon margarine
2 tablespoon flour
1 cup whole milk
1 tablespoon mustard, dijon-style
1/8 teaspoon ground black pepper

Directions:
Melt the margarine in a small
nonstick saucepan over medium heat.
Add the flour; cook until bubbly.
Gradually stir in the milk,
cooking and stirring until thickened.
Add the salt and pepper.
Remove from the heat and
stir in the mustard.