Ingredients
Whisk garlic, mustard, lemon and oil until evenly combined. Add the mutton and turn to coat evenly. Cover and refrigerate for several hours or overnight.
Grill mutton for 5 minutes per side. Set aside in a warm place like a low oven (or cover with foil) for 5 minutes to allow the meat to rest. Sprinkle with salt and pepper. Serve at once with wilted spinach.