In a skillet, cook the bacon until crispy, then dice into small pieces. Set aside.
In a large bowl or on a serving platter, layer the kale and spinach medley, sliced Honeycrisp apple, dried cranberries, honey-roasted pecans, feta crumbles, and cooked bacon.
In a small bowl, whisk together the apple cider vinegar, diced shallot, Dijon mustard, honey, salt, and pepper. Gradually whisk in the olive oil until the dressing is well combined.
Pour the dressing over the salad just before serving. Toss lightly and enjoy!