Fun! Added about an extra 1/2 cup of spaghetti sauce and let it simmer down a bit. Completely skipped the step of hollowing out the buns and it didn't seem to make a difference. Could add part Italian sausage or extra seasoning to spice them up a bit. Refrigerated the leftovers and reheated in the microwave with good results. Would also be good to make ahead, wrap in foil, freeze, and reheat in the oven. Thanks for sharing the recipe!