Spiced Middle Eastern Lamb Burger

• Meanwhile, thinly slice red onion (see ingredients). 
• In a small bowl, combine the white wine vinegar and a good pinch of sugar and salt. Scrunch sliced onion in your hands, then add it to pickling liquid. Add enough water to just cover onion. Set aside.
• In a medium bowl, combine lamb mince, Middle Eastern seasoning, the egg and fine breadcrumbs. Using damp hands, shape lamb mixture into 2cm-thick patties (1 per person). 

• In a large frying pan, heat a drizzle of olive oil over medium-high heat.
• Cook lamb patties until just cooked through, 4-5 minutes each side (cook in batches if your pan is getting crowded).
• While the patties are cooking, halve bake-at-home burger buns and bake directly on a wire oven rack until heated through, 2-3 minutes.