Preheat your oven to 250C (480F). Combine beef and almond meal and your chosen spice in a large bowl. Season generously with salt. Roll teaspoonfuls of the mixture into balls and place in an ovenproof dish.
Pour over the tomato passata or puree and top with butter. Bake uncovered for 15 minutes or longer until the meatballs are browned on top and cooked through.
Serve meatballs on a bed of cauliflower rice, baby spinach or couscous with coriander leaves on top.