One unusual ingredient makes it the best version of the classic dessert I've ever had.Credit: Photo: Grant WebsterBanana pudding and strawberry shortcake are two of my go-to summer desserts. They're fresh, nostalgic, and total crowd-pleasers. When I saw that Meghan Markle, Duchess of Sussex, had created a dessert based on her grandmother's banana pudding recipe, I had to try it. I expected something reminiscent of the classic, but it was her une…