We have worked out a pretty decent system for evening camp meals that don't take to long.
We pre-cook food at home and vacuum seal it, and freeze it.  Each morning we put that nights supper out to thaw.  We try to find a way to thaw it by that night without it getting to hot.  Sometimes we thaw it in a small softside lunch cooler.  Then when we get back to camp we get both burners on our little Coleman camp stove going.  One burner we put a pot in with the sealed meal in it.  The other burner we put a pot on and boil water for noodles, instant potatoes, whatever our meal requires or a side.  Things like beef stew, chili, spaghetti, chicken ala king are staples.  It lets us have our evening meal prepared quick, fairly clean, and easy without a big effort cooking.  We are worn out and ready for food and sleep by then.