Easy Cheesy Sauce

I made this great cheese sauce the other day. It could be used for many things, but I used it on chili cheese fries. I had leftover chili, cut up potatoes and baked them and then made this great cheese sauce that I got from Rachel Ray http://www.rachaelrayshow.com/food/recipes/dinner-size-texas-chili-cheese-fries/. I changed it a bit, but I like it because the leftovers stayed creamy, and didn't separate like my normal cheese sauce. Here is what I did.

3 tablespoons butter
3 tablespoons flour
1 tablespoon yellow mustard
1 cup milk
1 cup chicken stock
1 1/2 to 2 cups shredded sharp cheddar cheese

Place a medium-size pot over medium-high heat and melt the butter. Sprinkle the flour over the melted butter and cook it for about a minute. Stir the mustard into the butter-flour mixture, then whisk in the milk and stock. Continue whisking the sauce until it has thickened up, then remove the pot from the heat and stir in the cheese until melted. Season the cheese sauce with salt and freshly ground black pepper.

I put a pile of fries down, a glob of chili and then poured this heavenly sauce over the top. She said to use 3 tablespoons mustard, but I found it way to mustardy. Use what you like, if you like mustard...go crazy with it. The leftover sauce was good cold too. I dipped tortilla chips in it, and it was great. I must make this again. Let me know what you think and if you have any other good ideas for it. ENJOY!