Xinjiang roasted whole lamb

Ingredients

• 1 whole lamb (about 15-20 kg, cleaned)
• Marinade: 3 tbsp salt, 2 tbsp cumin powder
• Marinade: 1 tbsp chili powder, 1 tbsp black pepper
• Marinade: 2 tbsp flour (mixed with water for paste)
• 5 scallions, 3 slices ginger (for stuffing)
• 1 tsp five-spice powder
• Equipment: pit oven or large charcoal grill