Step 1Heat the oven to 400 degrees. Brush 2 baking sheets with oil.
Step 2Cut the won ton wrappers in half diagonally, then brush them with the egg white and place them on the baking sheets in a single layer. Sprinkle them with the sesame seeds and salt to taste.
Step 3Bake them until golden brown, about 6 to 7 minutes. Remove to a wire rack to cool.
Step 4Cut the ham slice into large chunks and process in a food processor until finely ground. Add the onion, garlic, curry powder, cumin, coriander, cardamom, ricotta cheese, milk and salt. Blend until all the ingredients are thoroughly combined. Chill until serving time, at least 1 hour.
Step 5Turn the cabbage over so the stem end is down. Using a sharp knife, hollow out the center of the cabbage into a bowl shape. Spritz the cabbage with a little water and place in a plastic bag. Refrigerate the cabbage until you're ready to set up the platter.
Step 6To serve, spoon the ham pa^te into the hollowed-out cabbage. Sprinkle a few sesame seeds over the top of the pa^te for garnish. Arrange the ornamental cabbage leaves on the platter and set the stuffed kale on top. Serve with the baked won ton chips.