Meatloaf with Caramelized Onions Recipe

Ingredients

• 1 1/2 pounds ground beef
• 1/2 pound ground pork
• 1/2 cup panko breadcrumbs
• 1/4 cup whole milk
• 2 large yellow onion
• 2 tablespoons olive oil
• 3 cloves garlic cloves
• 1 large egg
• 1/4 cup ketchup
• 2 teaspoons Worcestershire sauce
• 1 1/2 teaspoons salt
• 1/2 teaspoon black pepper
• 1 teaspoon dried thyme
• 1 teaspoon brown sugar
• 2 teaspoons balsamic vinegar