Preheat your oven to 375°F and line a small baking dish with parchment paper.
Heat the olive oil in a small skillet over medium heat and sauté the finely diced onion and minced garlic until translucent and fragrant.
In a large mixing bowl, combine the ground beef, egg, almond flour, sautéed onion and garlic, sea salt, black pepper, and dried oregano.
Mix the ingredients gently by hand until just combined, ensuring you do not overwork the meat to maintain a tender texture.
Shape the mixture into a compact loaf and place it into the prepared baking dish.
In a small bowl, whisk together the tomato paste, balsamic vinegar, and honey to create the glaze.
Spread the glaze evenly over the top and sides of the meatloaf using a spoon or pastry brush.
Bake for 35 to 40 minutes, or until the internal temperature reaches 160°F.
Allow the meatloaf to rest for at least 5 minutes before slicing to keep the juices locked inside.