In a 4 cup pyrex measuring cup, melt 3 Tbsp. butter. Blend in 3 Tbsp flour, 1 tsp salt, 1/4 tsp pepper, 1-2 Tbsp. spicy brown mustard (French's is less spicy than Gulden's) to taste. (The mustard gives it a nice little tang).
Microwave for 45 seconds, then stir 2 x
Stir in 1 cup of milk and 1 cup chicken bouillon until well blended.
Microwave for 2 minutes. Stir.
Microwave for 2 more minutes. Stir. Repeat microwaving and stirring until sauce is thickened.
Add 1 cup cheddar cheese (sharp white cheddar gives the best flavor, though, if you have it) Add up to 2 cups if you like a really cheesy sauce =) I would recommend starting with 1 cup and then tasting the sauce and then adding more from there.
and 1 tsp. worcestershire sauce.
Stir until smooth.
Use this sauce with the recipe that I posted earlier =)