Make Burger Slaw by mixing all ingredients in a small bowl. Set aside.
In a small bowl whisk together soy and hoisin sauces. In a medium size bowl mix all the burger ingredients with half of the soy sauce mixture (set aside the other half for later). Form into 4 patties.
In a sauté pan over medium heat, toast prosciutto lightly on both sides 1-2 minutes. Remove to paper towel and set aside.
Preheat grill to medium-high. Oil grill plates. Grill pineapple slices 1 minute per side and set aside.
Place pork patties on well oiled grill and cook in closed barbecue for 5 to 7 minutes per side, testing doneness with a digital rapid-read thermometer inserted sideways into centre of each patty – burgers are completely cooked when thermometer reads 160°F (71°C).