In a food processor or high speed blender, process/blend all ingredients on high speed until pureed, scraping the sides to incorporate all ingredients evenly. Store in a sealed jar in the refrigerator until ready to use, leftovers can be refrigerated for 1-2 weeks.
Preheat your oven to 375 degrees F.
In a medium skillet, sauté the onions in the 2 Tbsp ghee (or other cooking fat) until soft, add the garlic, sprinkle with a tiny bit of sea salt and continue to cook, stirring, for about one minute, then remove from heat.
In a large bowl, combine the beef, eggs, almond flour, 3 Tbsp ketchup, cooked onion and garlic with ghee, salt, mustard, Italian seasoning and black pepper. Mix with your hands until well incorporated but try not to over-mix, since this will toughen the meat.
Transfer the meat mixture to a 9 x 5 loaf pan (or 8.5 x 4.5) and bake in the preheated oven for 20 minutes. After 20 minutes, remove and spread ¼-⅓ cup of the ketchup over the top of the loaf, return to oven and continue to bake for 40-45 more minutes until center is cooked (an internal temp of 160 degrees F)
Allow the loaf to rest for 10 minutes or so, then slice and serve, garnished with chopped parsley if desired. Leftovers can be stored in the refrigerator in a sealed container for up to 4 days. Enjoy!