Heat oil and cook onion until soft, about 5 minutes. Add garlic and thyme and cook 1 minute more; set aside.

Combine milk, egg, and ketchup. Stir in bread crumbs, salt, and pepper. Crumble in meats and add onion mixture. Stir until well combined.

Freeze meat into loaves, using foil and plastic wrap method.

On serving day, thaw loaf and place in baking dish.

Bake at 350 degrees for 1 1/2 hours.

If desired poor 1/2 cup ketchup mixed with brown sugar over meatloaf during the last half hour of baking.