Preheat the oven to 375 degrees and line a baking sheet with parchment paper.
Place the ground beef in a large mixing bowl. Add the almond flour, half of the crumbled feta, the onion, garlic, egg, oregano, parsley, salt, and pepper.
Mix everything with clean hands or a spoon until the ingredients are evenly combined but not overworked.
Shape the mixture into a loaf about 8 inches long and place it on the prepared baking sheet.
Press the remaining feta gently into the top of the loaf so it sticks during baking.
Bake for 45 to 50 minutes until the internal temperature reaches 160 degrees. Let the meatloaf rest for 5 minutes before slicing.