If you are serving Cold: 1/4 cup olive oil and 1/4 cup red or white wine vinegar, fresh herbs (thyme, dill, chives are all good; or if you don't have fresh, use dried Italian seasoning)
If you are serving Hot: 4 ounces neufchatel cheese, 1/4 cup grated cheese (cheddar, parmesan, gouda are all good choices) and 1/4 cup fat free half and half.
Mix sauce ingredients together and toss with pasta. Enjoy with a green salad or melon! That's food that is convenient and delicious!