Preheat oven to 375 F and spray a muffin tin with non-stick cooking spray.
In a large bowl, thoroughly combine all ingredients together with your hands, except for the shredded cheese.
Divide beef mixture into 12 equal-sized portions and place into the muffin tin slots. Place in preheated oven for 20-25 minutes, or until the meat is cooked through.
Carefully remove the muffin tin from oven. If there is excess moisture on the top of each muffin, blot the tops with a clean paper towel. Then top each muffin with the shredded cheese.
Return to oven for 5 minutes, or until cheese is melted and starts to turn golden brown.
Let the muffins cool for 5 minutes before removing them from the muffin tin.
Notes
If you want to use almond flour instead of coconut flour in this recipe, use 6 tbsp almond flour.
If you want to use dried rosemary instead of fresh rosemary in this recipe, use 1 tsp dried rosemary.