Adrienne's Overnight Barbecued Beef Sandwiches

Details

Ingredients

• 1 large onion, chopped
• ½ cup brown sugar
• 1 teaspoon ground black pepper
• ¼ teaspoon salt
• 1 teaspoon chili powder
• 1 teaspoon paprika
• 1 teaspoon dried oregano
• 2 cloves garlic, minced
• 1 cup ketchup
• ½ cup water
• ½ cup white vinegar
• 2 tablespoons canola oil
• 2 tablespoons Worcestershire sauce
• 3 drops liquid smoke flavoring
• 1 (3 pound) beef brisket
• 2 teaspoons cornstarch
• 10 whole-wheat buns