Dinty Moore Beef Stew I add a handful of a green veggie, either peas or green beans when I heat it up and a gluten-free roll or bread and butter. Dinner done.
I keep a package of Kinnickinnick pizza shells in the freezer, a package of Hormel Pepperoni, pizza sauce and some cheese on hand at all times. The pizza shells come 4 to a package for about 9 bucks and are a good size for a personal pan pizza. If the rest of the family isn't gluten free you could fix one or two of those for the nongluten eaters and let the rest of the family 'order in'.
I know it's not the same as going to grab something but at least it isn't hours at the stove.