Remove chorizo from casings. In a large cast-iron or other heavy skillet, cook chorizo over medium heat until cooked through, breaking into crumbles, 6-8 minutes. Drain and return to pan., In a small bowl, whisk eggs and milk until blended. Add egg mixture to chorizo. Cook and stir until eggs are thickened and no liquid egg remains. Stir in cheese. Spoon 1/2 cup egg mixture across center of each tortilla. Add toppings of your choice. Fold bottom and sides of tortilla over filling and roll up.