Tiramisu Cake

• 1 angel food cake
• 1 espresso (cold)
• 190 gr nonfat ricotta cheese
• 190 gr almonds (sliced)
• 180 ml amaretto liqueur
• 120 gr mascarpone cheese
• 50 gr powdered sugar
• 45 ml skim milk
• 32 gr shaved bittersweet
• 14 gr powdered sugar