Preheat your oven to 375°F and line a small baking sheet or loaf pan with parchment paper.
Finely dice the yellow onion and red bell pepper to ensure they blend seamlessly into the meat mixture.
In a large mixing bowl, combine the ground beef, ground turkey, egg, almond flour, and tomato paste.
Add the dried oregano, dried thyme, garlic powder, sea salt, and black pepper to the bowl.
Gently mix the ingredients by hand until just combined, being careful not to overwork the meat to maintain a tender texture.
Fold in the diced onions and bell peppers until evenly distributed.
Shape the mixture into a uniform loaf on the prepared baking sheet.
Bake for 35 to 40 minutes, or until the internal temperature reaches 165°F.
Remove from the oven and let the meatloaf rest for 5 minutes before slicing to allow the juices to redistribute.