400g lamb mince
1 red onion , 1/2 grated, 1/2 thinly sliced
handful parsley, roughly chopped
handful mint, roughly chopped
1/2 tsp harissa paste (optional)
1 tsp olive oil
3 tbsp mayonnaise
2 cooked beetroot , finely chopped
4 burger buns
Mix the lamb, grated onion, harissa (if using) and herbs in a bowl with a good pinch of salt and freshly ground black pepper to taste, then divide the mix into 4 and shape into burgers.
Heat a griddle pan until hot, rub the burgers with oil, and cook for 5-6 mins on each side, or until cooked through.
Mix the mayonnaise and beetroot with salt and pepper. Put some watercress into your burger buns then top with a burger, a dollop of beetroot mayo and a few onion slices. Simples!