Mandarin Meringue Roll with Citrus Curd

Ingredients

• 170 grams (6 ounces) egg whites
• 245 grams (8.7 ounces) sugar
• 35 grams (1.2 ounces) cornstarch
• pinch of salt
• 2 teaspoons (0.3 fluid ounces) lemon juice
• flaked almonds (to taste)
• 250 grams (8.8 ounces) mascarpone
• 130 milliliters (4.4 fluid ounces) heavy cream
• 40 grams (1.4 ounces) powdered sugar
• 300 grams (10.6 ounces) peeled mandarins
• 2 egg yolks
• 25 grams (0.9 ounces) sugar
• 20 grams (0.7 ounces) cornstarch