If you have cherry tomatoes, you can make an unbelievably simple pasta sauce by just chucking the tomatoes in, cooking until they go jammy, and perhaps with whatever herbs you like. Once the tomatoes go in, put some pasta on, and in 10ish mins it'll be ready.

Another simple sauce for pork is if you finely chop some apples, cook it all down until soft, and then throw some cider in, reduce, add stock, and finish with a bit of dijon mustard. Takes very little time, and is greater than the sum of its parts.