Tofu and Sweet Pepper Shish Kebabs

Name: Tofu and Sweet Pepper Shish Kebabs
Ingredients: 1 cup organic ketchup; 1 teaspoon balsamic vinegar; 1 teaspoon tamari; 1/3 cup molasses; 2 teaspoons brown sugar; 1 teaspoon chili powder; ¼ teaspoon garlic powder; 1/16 to 1/8 teaspoon cayenne; 10 metal or bamboo skewers; 1 ½ blocks firm or extra firm tofu, pressed and drained (see note in Tips/Techniques); 3 sweet peppers, seeded and cut in 1 ½ inch pieces (orange, red and/or yellow are nice); 2 medium sweet onions, cut into chunks; 2 medium zucchini, cut into ½ inch thick slices; 16 ounces crimini mushrooms, cleaned and stems removed; 10 cherry tomatoes