Sheesh kebab recipe

Serving : 4

Lamb    : 1.5 lb
Yogurt  : 1 cup
Black pepper: 1 tsp
Olive oil       : 3 tbsp
Kothmir       : 3 tbsp
Garlic          : 2 cloves
Salt              : 1 tsp
Onion          : 1
Oregano      :
Red pepper flakes : 2 tsp

1. 6 garlic cloves, crushed
2. 3 tablespoons extra-virgin olive oil, plus more for brushing
3. 3 tablespoons fresh lemon juice
4. 1 teaspoon kosher salt
5. 1 teaspoon freshly ground pepper
6. 1 teaspoon dried mint
7. 1 teaspoon dried oregano
8. 1 1/2 pounds trimmed boneless leg of lamb, cut into 1 1/2-inch cubes
9. 1 small bunch of fresh mint
10. 1 large red onion, cut into 2-inch pieces
11. 1 large yellow bell pepper, cut into 2-inch pieces
12. 1 large green bell pepper, cut into 2-inch pieces
13. Vegetable oil, for the grill