Low-Fat Black Forest Cake

Ingredients

• 8 large egg whites
• 4-1/2 tbsp cocoa powder (unsweetened)
• 4 tbsp all-purpose flour (plain)
• 1-1/2 tbsp caster sugar
• 1 cup sugar
• 1 tsp cream of tartar
• 1-1/2 tsp vanilla extract
• pinch salt
• 1-1/2 tbsp water
• 1 tsp powdered clear gelatin
• 1 tbsp soft brown sugar
• 2 tsp corn starch
• 1/2 tsp lemon zest (grated)
• 15 oz sour cherries (pitted, reserve the juice)
• 1/3 cup cream (for whipping)
• 1 tbsp confectioner's sugar
• 1/3 cup low-fat evaporated milk (chilled)
• 1 tsp lemon juice