Sometimes the fridge is almost empty and all you have left are staples. This is why it’s important to have a few items that do not spoil too quickly. One of them being a jarred pesto sauce.
Meanwhile, see what vegetables you have around, I had mushrooms and diced them up. You can also use left over asparagus, spinach, brussel sprouts, or even frozen peas. If the veg is raw, you can blanche it while the pasta is boiling. If you have any leftover chicken hanging around, you can add it too.
Turn off the stove, add the pesto and the cooked pasta. Stir and taste, add more pesto to your liking. I added more hot pepper too.