TO MAKE THE BURGERS
750G good quality Irish minced beef
1 small onion, finely chopped
2 tsp Dijon mustard
1 tbsp apple cider vinegar
2 tbsp fresh flat leaf parsley, finely chopped
1 egg free range, beaten
FOR THE BURGER
4 burger buns
Sliced cheese
Baby gem lettuce, separated and washed
2 large tomatoes
1 red onion, thinly sliced rings
Hot red sauce