This is something I tried last night, and it was pretty good, and very filling.
1/2 c. whole wheat elbow macaroni (or 3/4 c. whole wheat rotini)
2 c. frozen vegetables, thawed
1/4 c. lf cheese sauce
2 T. ff sour cream
Cook the pasta until tender; drain. Turn stove on low heat. Add thawed vegetables (I used broccoli and cauilflower mix) and cheese sauce, stirring constantly until well blended. Remove from heat and add sour cream, stirring until well blended.
I used 1/4 c. sour cream last night and it was just a little too much. I also think it'd be good with mushrooms or chopped red pepper. Just an idea. It's easy and quick!