Preheat your oven to 375°F and line a small loaf pan with parchment paper for easy removal.
Finely dice the yellow onion and red bell pepper, and mince the garlic clove into very small pieces.
In a large mixing bowl, combine the ground bison, egg, almond flour, diced onion, diced pepper, minced garlic, sea salt, black pepper, and dried thyme.
Mix the ingredients gently by hand until just incorporated, ensuring you do not overwork the meat to maintain a tender texture.
Shape the mixture into a uniform loaf and place it into the prepared loaf pan.
In a small ramekin, whisk together the tomato paste, balsamic vinegar, and coconut aminos until smooth.
Spread the glaze mixture evenly over the top of the bison loaf using a spoon or pastry brush.
Bake for 35 to 40 minutes or until the internal temperature reaches 160°F and the glaze has set into a dark, savory crust.
Allow the meatloaf to rest for 5 minutes before slicing into thick portions to ensure the juices remain inside.