I make a good split pea soup with a ham bone. Also, a good beef barley soup with the leftovers from a pot roast. My favorite is the rare time we get a prime rib roast and make soup out of the bones.
Soup is easy. If you don't have bones to cook down, just use Better Than Bullion paste. Add whatever vegetables you have in your fridge and meat that corresponds with the paste flavor.
Or leave out meat.
Lately I've made lazy meatballs in the air fryer and add them to beef vegetable soup.