Lamb, Caper and Rosemary Burgers

SERVES 4 INGREDIENTS 800g lamb shoulder, diced • 2 tsp baby capers • 4 sprigs rosemary leaves • finely grated zest and juice of 2 lemons • 2 egg yolks • ½ cup multigrain breadcrumbs • sea salt flakes and freshly-milled black pepper • 1 Tbsp extra virgin olive oil • 4 brioche rolls •…