Preheat the oven to 375°F (190°C). Lightly grease two ramekins or small baking dishes.
Make the cherry filling:In a medium bowl, combine the cherries, granulated sugar, cornstarch, cinnamon, vanilla extract, and lemon juice. Stir until the cherries are evenly coated.
Prepare the crisp topping:In a separate bowl, mix together the oats, flour, brown sugar, granulated sugar, cinnamon, and vanilla. Pour in the melted butter and stir until the mixture is crumbly.
Assemble the crisps:Divide the cherry mixture evenly between the two ramekins. Spoon the crisp topping generously over each.
Bake to golden perfection:Place ramekins on a baking sheet and bake for 20 minutes, or until the tops are golden brown and the filling is bubbling.
Serve warm:Let cool for a few minutes before topping each crisp with a scoop of vanilla ice cream. Enjoy immediately!