Preheat the oven to 350°F. Combine eggs, oil, sugar, potato starch, vanilla, and baking powder. Add the crushed pineapple (if juice has accumulated since the pineapple has been processed, drain). Garnish with additional pineapple rings. Place into a round 9-inch pan and bake for 40 minutes or until golden.

As seen in the Joy of Kosher with Jamie Geller Magazine Passover 2012 edition - Subscribe Now  contributed by our Balabusta Next Door, Toby Ash.

Check out this video based on this recipe but turned dairy for help with the right consistency.