*Simmer the pineapples* Cut the pineapple into 1.5 cm chunks and place in a small pot. Add the granulated sugar and turn the heat down to low. Once the sugar has dissolved, the moisture comes out of the pineapple, and they are heated through, it's ready. Don't worry too much about the details! ※ If using canned pineapples, you can use them straight from the can.