Mix butter, sugar & flour together, when combined add yolk, combine but work as little as possible, rest in fridge for minimum 30 minutes.
Roll out on floured surface to about 3mm thick, rest in fridge further 30mins. Line a 30cm flan tin & set aside.
Cream yolks, zest & 1⁄2 cup of sugar, slowly add oil then wine, combine dry ingredients & add to yolk mix.
Whisk whites & 1⁄4 cup of sugar to meringue stage, fold into rest of mix. Pour into lined tin & arrange some quartered poached pears on top, sprinkle with slivered almonds.