You can use wonton wrappers instead of spring roll wrappers for a thicker and crunchier shell., Cream cheese can be substituted for mascarpone with little flavor difference., Frozen berries can be used if fully thawed, drained, and patted dry to avoid sogginess., Alternative fillings like lemon curd, pineapple curd, or vanilla pastry cream can be used., Toppings can vary with coconut flakes, chocolate shavings, or citrus zest for different flavors., The shells can be baked 1-2 days ahead and stored airtight at room temperature., The filling can be prepared up to 4 days ahead and refrigerated, then re-whisked before use., Chopped berries can be prepared and refrigerated for 2-3 days., Avoid filling warm shells to keep shells crispy.