One of my favorite dishes I used to make was simply a quick sauce of butter, garlic, and onion. Toss in cooked pasta and already seared pre-cooked and seasoned turkey meatballs (Jenny-O, I think the brand was called). Salt, pepper, and grated parm to taste. If I didn't melt enough butter for the sauce then a quick drizzle of olive oil would help finish it.
And of course, there's the technique of adding very thinly sliced garlic to cold olive oil in a pan, raising the heat so the flavor of the garlic slowly infuses, and tossing in pasta once the garlic is cooked. Salt, pepper, and red pepper flakes to liking. It's a tasty carb bomb I used to make as a quick lunch on the weekends. One can also saute whatever veggies they like first on the side and toss those in once done.