Preheat your oven to 375°F (190°C) and line a small baking dish with parchment paper.
Finely dice the yellow onion and mince the garlic cloves until they are very fine.
In a large mixing bowl, combine the lean ground beef, egg, almond flour, onion, garlic, parsley, thyme, rosemary, sea salt, and black pepper.
Gently mix the ingredients by hand until just combined, ensuring the herbs and aromatics are evenly distributed without overworking the meat.
Shape the mixture into a classic loaf shape and place it onto the prepared baking dish.
In a small bowl, whisk together the tomato paste, Dijon mustard, and coconut aminos to create a clean glaze.
Spread the glaze evenly over the top and sides of the meatloaf using a spoon or brush.
Bake for 35 to 40 minutes, or until the internal temperature reaches 160°F (71°C).
Remove from the oven and let the meatloaf rest for 5 to 10 minutes before slicing to lock in the juices.