Meatloaf with Oatmeal: Nan's Best Ever Recipe!

Ingredients

• 1.5 lbs (680g) ground beef (80/20 blend recommended)
• 1 cup (90g) rolled oats (not instant)
• 1 cup (240ml) milk (any kind)
• 1 medium yellow onion, finely chopped (about 1 cup chopped)
• 2 cloves garlic, minced
• 1 large egg, lightly beaten
• 1/4 cup (60ml) ketchup
• 2 tablespoons Worcestershire sauce
• 1 teaspoon smoked paprika
• 1 teaspoon dried Italian herbs
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1/2 cup (120ml) ketchup
• 2 tablespoons brown sugar (light or dark)
• 1 tablespoon apple cider vinegar
• 1 teaspoon Dijon mustard