Lamb Shish Kebabs

Ingredients

• 1/4 cup dry red wine
• 1 1/2 tablespoons dried oregano
• 1 1/2 tablespoons dried mint flakes
• 2 tablespoons lemon juice
• 2 teaspoons olive oil
• 4 garlic cloves, minced
• 1 1/2 pounds lean cubed boned leg of lamb
• 18 (1-inch) squares green bell pepper (about 3 large peppers)
• 18 cherry tomatoes
• 1 large onion, cut into 6 wedges
• Cooking spray