Lentil Sloppy Joes

Ingredients

• 2 tablespoons olive oil
• 1 large sweet onion, chopped
• 1 medium green pepper, chopped
• 1/2 medium sweet red pepper, chopped
• 1 medium carrot, shredded
• 6 garlic cloves, minced
• 2-1/2 cups reduced-sodium vegetable broth
• 1 cup dried red lentils, rinsed
• 5 plum tomatoes, chopped
• 1 can (8 ounces) tomato sauce
• 2 tablespoons chili powder
• 2 tablespoons yellow mustard
• 4-1/2 teaspoons cider vinegar
• 2 teaspoons vegan Worcestershire sauce
• 2 teaspoons maple syrup
• 1-1/2 teaspoons tomato paste
• 1/4 teaspoon salt
• 1/8 teaspoon pepper
• 14 whole wheat hamburger buns, split and toasted