Take this list with you to any of our 8 supermarkets:
Wrap the crackers in a tea towel and smash up until fine, and put them into a large bowl. Add the parsley, mustard and minced beef to the bowl. Crack in the egg and add a good pinch of salt and pepper.
Mix everything up well with your hands and divide into 6 burger patties. Drizzle with oil, put on a plate, cover and place in the fridge until needed (this will help them firm up).
Preheat a large frying pan for about 4 minutes on a high heat. Turn the heat down to medium and place the burgers, using a spatula to lightly press down on them, making sure the burger is in full contact. Cook to your liking for 3 or 4 minutes on each side.
Serve with the vegetables and cheese as desired.