Sieve Ricotta cheese into a large bowl, and add beaten egg yolks, sugar, candied peel, lemon juice and rind, and ground almonds.
Beat together well.
Butter a 23 cm/9 in flan tin, and pour mixture into it.
Bake in a pre-heatcd oven, 180°C/Gas Mark 4/350°F, for 40 min., or until cheesecake is set.
Serve hot or cold, sprinkled with sugar.