Inspiring vegetarian recipes
Try our vibrant veggie dishes, from meat-free lasagne to vegetable curry and vegetarian chilli
Toss the relish ingredients and leave to sit.
To make the burgers, put the mince, onion and garlic salt in a bowl. Season with pepper and mix well, then divide into four balls. Use a spatula to squash each into a flat patty.
Brush each patty with oil then fry in a hot frying pan for 2 minutes on each side until cooked through. Add a slice of cheese to each burger and either cover the pan with a lid until it melts or flash under a hot grill.
Spread the toasted bun halves with the horseradish mayo. Top 1/2 of them with lettuce, a burger, then a spoonful of the relish. Top with the remaining bun halves and serve.