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["Lightly oil a 6-1/2 cup ovenproof dish.", "Cream butter with 1/4 cup of the superfine sugar until light and fluffy. Gradually beat in the eggs, one at a time, adding 2 teaspoons of flour with each addition.", "Stir in 1 tablespoon lemon zest with the remaining flour, the ground almonds and baking powder. Spoon into the prepared dish.", "In a small bowl, mix the remaining sugar, 1 tablespoon lemon zest and 4 tablespoons lemon juice with 1 1/4 cups boiling water. Pour into prepared dish.", "Cover prepared dish with aluminum foil and secure around dish. Also make 2 long aluminum foil ""handles"" by folding aluminum foil into long strips.", "Place the trivet in the pressure cooker so the prepared dish will not sit on the bottom, allowing room for liquid to heat underneath. Add the 2 tablespoons lemon juice to the pot. Set the aluminum foil handles in place on top of the trivet, crossing each other at a 90-degree angle (as if about to wrap a present with ribbon).", "Set prepared dish on top of the middle of the ""handles"" in the cooker, on top of the trivet. For each handle, complete the loop, pressing together the ends of the aluminum foil.", "Pour the remaining 4 cups boiling water between the side of the prepared pan and the edge of the cooker wall.", "Secure the lid. DO NOT TURN ON HEAT YET. Allow to presteam for 15 minutes from the boiling water in the pot.", "Bring pot up to 10 psi or low pressure, and adjust heat to maintain low pressure. From moment that low pressure was reached, cook for 10 minutes.", "Remove from heat. Allow to depressurize naturally until steam vent has sunk.", "Remove lid. Serve pudding in bowls and sprinkle with confectioners sugar."]
