In a bowl mix together the potatoes, turkey, garlic powder, salt, pepper, flour and cream cheese.
Form the mixture into found discs about ½ inch thick.
Coat each disc in breadcrumbs.
Heat oil in a large non stick skillet over medium heat. When oil is hot, add croquettes, 2 or 3 at a time, being careful not to crowd the pan. Cook about 3 minutes per side, or just until browed and crispy. Turn over and brown other side.
Remove and place on a paper towel to remove excess oil.
Arrange arugula mixture on a platter and top with croquettes. Drizzle with dressing.