Tempeh Sloppy Joes

Ingredients

• 12.5 cup water, divided
• 12-13 small onions onion, chopped
• 12-13 peppers green bell pepper, seeded and chopped
• 6 pounds, 4 ounces tempeh, crumbled into small pieces
• 1 #10 can tomato sauce
• 1.5 cups ketchup
• 3/4 cup agave nectar
• 3/4 cup apple cider vinegar
• 3/4 cup vegan Worcestershire sauce
• 1/2 cup prepared mustard
• 2 tablespoons garlic powder
• 50 buns multigrain hamburger buns