I don't have this problem very often as I tend to find every last morsel of the aioli disappears! However, if you do have any leftover, it is delicious as a dip for crisps, vegetable crudités and onion rings - or cheesy things like breaded mozzarella or halloumi fries. You can pretty much serve it like you would regular mayonnaise - so inside a sandwich, with steak or burgers. It is also super tasty with fish and chips in place of tartare sauce too (or with my Tempura Cod Goujons) - or with other deep-fried fish bites like my Panko Shrimp.