Combine ground meat, almond flour, grated parmesan cheese and egg.
Form into 15 meatballs and place into refrigerator for 15 minutes to firm up.
Slice deli ham and cheese into small squares (to fit into center of meatballs) and stack squares alternately; 3 cheese and 3 ham.
After about 15 minutes remove meatballs from refrigerator and stuff with ham and cheese stacks by pushing one stack into the center of each meatball and rolling back into a ball shape.
Cook in air fryer at 400°F for 10 minutes or until lightly browned and center reads 165°F.
Sauce:
In a small saucepan combine broth, Dijon mustard, heavy cream, lemon juice, and nutmeg.
Salt and pepper to taste.
Serve immediately. If sauce sits for too long, it will separate.
