Greek Island Chicken Shish Kebabs

Name: Greek Island Chicken Shish Kebabs
Ingredients: 1/4 cup olive oil; 1/4 cup lemon juice; 1/4 cup white vinegar; 2 cloves garlic minced; 1 teaspoon ground cumin; 1 teaspoon dried oregano; 1/2 teaspoon dried thyme; 1/4 teaspoon salt; 1/4 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