In a bowl, combine the blueberries, granulated sugar and the zest of one lime. Pour into the bottom of a 2 qt casserole dish.
For the crumble, combine the sugar with flour, oats, butter and zest of lime. Mix until the butter is incorporated and the mixture becomes like “crumbs.”
Spread over top of blueberries, pressing until it becomes firm.
Bake in a 375°F oven for 35 minutes.
For the whipped cream, beat the cream and sugar on high with an electric mixer for 3 minutes, until stiff peaks form. Refrigerate until ready to use.
Serve the hot crumble with a spoonful of whipped cream. ENJOY.