These work as both a snack before supper or as a starter with an avocado and gem lettuce salad. They also work in bite-sized form, as a canapé. Just make them a third of the size and reduce the cooking time to 1 minute on each side. The mix can be made up the day before, if you want to get ahead, and then just wait in the fridge to be fried. You can also fry them the day before, if you like, and keep them in the fridge to warm through before serving.