Marinated Grilled Lamb Kabobs

Name: Marinated Grilled Lamb Kabobs
Ingredients: 1 boneless leg of lamb (about 5 pounds); 1/2 cup extra-virgin olive oil; 1/4 cup lemon juice; 1/4 cup honey; 6 cloves garlic, finely chopped; 1 large white onion, finely chopped; 1/4 cup chopped fresh mint leaves; 2 tablespoons chopped fresh oregano leaves; 2 teaspoons chopped fresh rosemary leaves; 2 large white onions, cut into 2-inch squares; 1 green bell pepper, cut into 2-inch squares; 1 orange bell pepper, cut into 2-inch squares; 1 red bell pepper, cut into 2-inch squares; 1 yellow bell pepper, cut into 2-inch squares; 1 pint cherry tomatoes, stemmed; 1 (8-ounce) package white button mushrooms; Wooden skewers, soaked in water for 30 minutes