Debone the mutton leg, now beat with an steak hammer to flatten. Now marinate well with 4 tbsp papaya paste. Keep it aside.
In a bowl mix together 2 tbsp ginger garlic paste, 4 – 5 chopped green chilies, 1 tsp all spice powder, 1 tbsp chili powder, 1 tbsp crushed red pepper, salt to taste and 2 tbsp lemon juice. Mix well.
Now marinate the mutton leg with marinade mixture.
Wrap marinated leg in aluminum foil, sprinkle 2 chopped onion, 3 chopped tomatoes and 2 chopped capsicum on top.
Lastly bake in a preheated oven on 180 degrees for 30 – 35 minutes.
Now remove from oven, dish it out and serve hot.