Our Favorite Meatloaf

Ingredients

• 1/2 cup ketchup, divided
• 2 large eggs
• 1/2 pound ground pork
• 1 1/2 pounds ground beef chuck, preferably 20% fat
• 3 tbsp. Worcestershire sauce
• 1 1/2 tsp. freshly ground black pepper, divided
• 2 1/4 tsp. kosher salt, divided
• 2 tbsp. neutral vegetable oil
• 4 cloves garlic
• 1 stalk celery
• 1 medium onion, coarsely chopped
• 1/3 cup whole milk
• 1 cup fine fresh breadcrumbs