You are literally less than 10 minutes away from a serving of apple crisp with this recipe, and it’s everything an apple crisp should be, without having to commit to a whole pan.
In a microwave safe bowl, combine the apple base ingredients, dotting with the pieces of butter. Microwave on high for 2 minutes, stopping it to stir halfway through the cooking time.
Meanwhile, in a fry pan, combine the crumble topping ingredients. Cook the crumble on medium–high heat for about 2 minutes, swirling the pan every so often and stirring with a wooden spoon to evenly distribute the butter as it melts and to form clusters of crumble topping. The nuts will toast during this step so be careful not the burn them. Take the pan off the heat when the topping is cooked.
Top the cooked apple with crumble topping and enjoy.