Mix together 4 tablespoons ketchup, 4 tablespoons soy sauce, fresh ginger (1 piece, about 2 cm), grated, 5 tablespoons honey, 1 pinch chili powder, 1 tablespoon mustard, minced garlic (2 cloves), and pepper to form a thick marinade. Add the lamb chops and coat them thoroughly. Refrigerate for at least 1 hour.
Grill the chops over medium-high heat for 8-10 minutes, until they reach an internal temperature of 63-70 °C (145-158 °F). Do not overcook, as they will become tough and dry.
Serve the lamb chops with fried potatoes or roasted white bread.