Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper for easy cleanup, if desired.
In a mixing bowl, combine the ground beef, almond flour, egg, shredded cheese, taco seasoning, chopped onion, minced garlic, salt, and pepper. Mix until all ingredients are well combined.
Using your hands, form the mixture into meatballs, about 1.5 inches in diameter, and place them on the prepared baking sheet.
Bake the meatballs in the preheated oven for 20-25 minutes, or until they are cooked through and browned on the outside.
While the meatballs are baking, heat the enchilada sauce in a skillet over medium heat.
Once the meatballs are done, transfer them to the skillet and gently toss to coat them in the saucy goodness.
Serve the enchilada meatballs hot, garnished with fresh cilantro if desired.