Serves 2

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- ½, sliced into 1cm rings red onion
- 1 tbsp white vinegar or lemon juice
- 1 tsp caster sugar
- 2 tbsp plain flour
- 1, beaten free-range large egg
- 50g panko breadcrumbs
- 2 (about 150–200g each) pork loin steaks
- for frying olive oil spray
- 1, cored and sliced into 1cm rounds small green or red apple
- to taste salt and freshly ground black pepper
- to serve (optional) chopped lettuce
- 2, split, to serve burger buns or bread rolls
- to serve (optional) mayonnaise