Heat the oven to 375°F. Lightly grease 8 cups of a standard muffin pan.
In a large bowl, combine the ground beef, cooked wild rice, egg, breadcrumbs, onion, Worcestershire sauce, salt, and black pepper. Mix gently until evenly combined, taking care not to compact the mixture.
Divide the mixture among the 8 prepared muffin cups. Press it in lightly, leaving the tops rounded rather than packed down.
In a small bowl, stir together the cranberry sauce, ketchup, and Dijon mustard. Spoon the glaze over the tops of the meatloaves, dividing it evenly.
Bake until the meatloaves are cooked through and the centers reach 160°F, about 25 to 30 minutes. Let them rest in the pan for 5 minutes before loosening and serving.