Apple, fig, walnuts & camembert sponge cake

Ingredients

• 225 grams (8 ounces) egg whites
• 120 grams (4.2 ounces) powdered sugar
• 75 grams (2.6 ounces) sugar
• 90 grams (3.2 ounces) flour
• 1.5 grams (0.05 ounces) salt
• 0.66 teaspoons (0.066 ounce) lemon acid powder
• Apples to taste (approx. 1-2 apples, peeled, cored, and diced)
• Walnut crumbs to taste (approx. 60 grams (2.1 ounces))
• 200 grams (7 ounces or 1 cup) water
• 100 grams (3.5 ounces or 0.5 cups) sugar
• 20 grams (0.7 ounces or 1.5 tablespoons) lemon juice
• 250 grams (8.8 ounces or 1 cup) fig puree
• 50 grams (1.75 ounces or 0.25 cups) hard cider
• 4 grams (0.14 ounces or 1 teaspoon) agar
• 150 grams (5.3 ounces or 0.75 cups) sugar
• 100 grams (3.5 ounces or 0.5 cups) diced apples
• 300 grams (10.6 ounces or 1.25 cups) cream cheese
• 90 grams (3.2 ounces or 0.75 cups) camembert
• 250 grams (8.8 ounces or 1 cup) dairy cream (33-35%)
• 75 grams (2.6 ounces or 0.5 cups) powdered sugar