Herbed Onion Beef Brisket

Ingredients

• 1 beef Brisket Flat Half (2-1/2 to 3-1/2 pounds)
• 1 cup ketchup
• 2 tablespoons all-purpose flour
• 3 cups chopped onions
• 1/4 cup plus 2 tablespoons packed brown sugar
• 1/4 cup distilled white vinegar
• 2 teaspoons dried basil leaves
• 1 teaspoon garlic salt
• 1/2 teaspoon dried thyme leaves
• 1/4 teaspoon pepper