Prepare Your Greens: Clean Brussels sprouts thoroughly, removing any brown or yellow leaves before slicing or shaving them thinly.
Chop the Kale: Remove tough stems from kale leaves, stack them, roll tightly, and slice into thin ribbons.
Massage Your Greens: Drizzle one tablespoon of olive oil over greens, season with salt and pepper, and massage until coated.
Add Remaining Ingredients: Mix in diced apples, toasted pecans, dried cranberries, cheddar cheese, and crumbled bacon.
Whisk Together Vinaigrette: In a bowl, whisk shallot, apple cider vinegar, Dijon mustard, honey, salt, and pepper. Slowly add remaining olive oil and warmed bacon fat until emulsified.
Combine Everything Together: Pour vinaigrette over salad mixture and toss until well combined before serving.