1. Begin by preparing your pineapple. Slice the peeled and cored pineapple into 1/2-inch thick rings. Pat them dry with paper towels to remove excess moisture.
2. In a medium bowl, whisk together the flour, cornstarch, sugar, baking powder, and salt. Slowly add the cold sparkling water, whisking continuously until the batter is smooth and slightly thick. The carbonation in the sparkling water helps create a light and crispy texture.
3. In a large skillet, heat about an inch of vegetable oil over medium-high heat. You’ll know it’s ready when a drop of batter sizzles upon contact.
4. Dip each pineapple ring into the batter, ensuring it’s completely coated, and gently shake off any excess.
5. Carefully place the coated rings into the hot oil, frying a few at a time to avoid overcrowding. Fry for about 2-3 minutes on each side, or until they’re golden brown.
6. Using a slotted spoon, transfer the fried rings to a paper towel-lined plate to drain excess oil.
7. Dust the warm rings with powdered sugar and a sprinkle of cinnamon if desired. Serve immediately for the best texture and flavor.

As you make these, remember the joy of cooking comes not just from the final product but from the process itself. I often recall standing on a stool beside my mother as a child, eagerly watching the transformation of ingredients into a beloved family dish. Let that sense of wonder guide you as you fry each ring to golden perfection.