Jamie Oliver served up a tasty smash burger with gherkins, tomato, American mustard and Cajun seasoning on Jamie: Fast and Simple.

The ingredients are: ¼ of a small onion, olive oil, 125g higher-welfare beef mince, 1 teaspoon Cajun seasoning, 1 burger bun, tomato ketchup, 2 gherkins, American mustard, to serve, 1 tomato and 1 handful of mixed salad leaves.

See recipes by Jamie in his book titled: Simply Jamie available from Amazon now.