Saute olive oil and minced onion on low heat until translucent, about 5-7 minutes.
In a medium bowl, combine the ground turkey, cooked onion, oatmeal, egg, 0.25 cup ketchup, salt, and marjoram. Mix well until just combined.
Divide the mixture into four equal portions and shape them into small loafs. Place each loaf into a non-stick mini loaf pan or onto an un-greased nonstick baking pan.
In a small cup, mix the remaining 2 tbsp ketchup with the Worcestershire sauce. Brush this glaze evenly over the top of each meatloaf.
Bake uncovered for about 40 minutes at 350°F (175°C), or until cooked through and an internal temperature of 165°F (74°C) is reached.
After baking, let the meatloaves rest for 5 minutes before serving.
Notes
These petite turkey meatloaves are perfect for meal prepping and freeze well. Store leftovers in an airtight container for up to 3 days.