Step 1

Combine mince, chilli, onion, oregano, Dijon, egg, crumbs and parmesan in a bowl. Season, mix with damp hands, then form into 4 patties. Chill for 30 minutes.

Step 2

Meanwhile, preheat grill to high. Grill capsicum, skin-side up, for 3-4 minutes until the skin blisters and blackens. Place capsicum in a plastic bag and stand for 15 minutes. Once cool enough to handle, remove and discard skin. Slice into strips.

Step 3

Place a frypan over medium-high heat. Brush burger patties with oil, then cook for 5 minutes each side until cooked through.

Step 4

Fill buns with lettuce, patties, grilled capsicum, tomato, gherkins and aioli.