For the steak burger
- 700 g Irish chuck or flank steak, very finely minced (with about 10% fat )
- 4 tbsp grated onion
- 2 garlic cloves, finely grated
- 4 tbsp very finely chopped spring onions
- 4 tbsp beaten egg
To serve
- 4 ciabatta buns, split in half
- 4 tbsp mayonnaise
- 1 little gem lettuce, trimmed and broken into leaves
- 4 square slices vintage Cheddar cheese (such as Dubliner)
- onion, sliced into thin rings
- 4 heaped tbsp onion marmalade
- sea salt and freshly-ground black pepper