1teaspoonlemon juiceapproximately, or a little more/less to taste
2tablespoonbrown sugar
½teaspooncinnamonor a little more, to taste
1tablespoonunsalted butter
Instructions
Peel and core the apple and cut into small slices or a relatively small dice. Add the lemon juice to the bowl, toss gently, then add the cinnamon and brown sugar. Mix everything together so the apples are evenly coated.
Warm the butter over a medium-low heat in a medium skillet/frying pan and add the apples. Stir to coat the apples in the butter and spread out in an even layer. Cook for around 6 - 8 minutes, stirring now and then so all of the slices cook evenly. They are done when the apples are gently soft and the liquid has reduced to a thicker more caramel-like consistency. Use immediately or allow to cool and transfer to a jar or container and store in fridge. Stir before using - can serve warm or chilled.
Video
Notes
I recommend you use a firm apple for the filling, ideally one that's sweet-tart, such as Gala, Braeburn, Fuji or Honeycrisp. You can cut the apples in a small dice or part slices, as in the pictures here, as you prefer. Just don't leave the pieces too big or they may not cook evenly or soften enough before the caramel reduces.