Heat a frying pan over medium-high heat. Once hot, add the bacon strips to the pan. Fry the bacon for 3-4 minutes per side, until crisp. Remove the bacon strips from the pan and drain on a paper towel.
Leave 1 tablespoon of bacon fat in the pan and add the apple slices. Stir fry for 2-3 minutes over high heat until the apple slices have begun to turn soft and slightly golden.
Reduce the heat to medium and add the kale leaves. Toss to mix the apple slices and kale together. Cook for 4-5 minutes, or until the kale has softened and is dark green in colour.
While the kale is cooking, make the dressing. Add the olive oil, apple cider vinegar, maple syrup and black pepper to a bowl and mix to combine.
Slice the bacon into small bite-sized pieces. Set aside.
Add ½ of the dressing to the kale and apple slices right before the end of cooking and mix to combine.
Remove the kale and apples from the pan and place in a serving bowl. Top with the sliced bacon and the remaining dressing. Serve immediately and enjoy!