Greek Island Chicken Shish Kebabs

Name: Greek Island Chicken Shish Kebabs
Ingredients: 0.25 cup olive oil; 0.25 cup lemon juice; 0.25 cup white vinegar; 2 cloves garlic, minced; 1 teaspoon ground cumin; 1 teaspoon dried oregano; 0.5 teaspoon dried thyme; 0.25 teaspoon salt; 0.25 teaspoon ground black pepper; 2 pounds skinless, boneless chicken breast, cut into 1 1/2-inch pieces; 6 wooden skewers; 2 large green or red bell peppers, cut into 1-inch pieces; 1 large onion, quartered and separated into pieces; 12 cherry tomatoes; 12 fresh mushrooms