Preheat the oven to 350°F. Grease a 6-cup muffin pan with coconut oil.
Place the ground beef, oats, and egg in a large bowl. Use your hands to combine them.
Spoon equal amounts of the mixture into the cups.
Bake for 20-25 minutes, or until the internal temperature is 165°F. Remove the cupcakes from the pan and allow them to cool completely.
Peel, cube, and boil sweet potatoes until fork-tender. Drain the water and place 2 cups of the cubes in a mixing bowl. Add the yogurt and coconut oil.
Using a hand mixer, beat until smooth. Spread the frosting on the cooled cupcakes. Garnish with chopped curly parsley.
Store in an airtight container in the fridge.