Wash and chop the kale.
Slice the apples and toss them in lemon juice to prevent browning.
In a bowl, combine kale, apples, and cheddar cheese.
In a separate bowl, whisk together Dijon mustard, olive oil, vinegar, salt, and pepper to make the dressing.
Pour the dressing over the salad and toss to combine.
Pack the salad into meal prep containers.
