Make the dressing: In a small jar, combine olive oil, apple cider vinegar, lemon juice, maple syrup, Dijon, salt, and pepper. Shake until emulsified and slightly thickened.
Taste and adjust sweetness or acidity as you like.
Prep the kale: Remove tough stems, finely chop the leaves, and place in a large bowl. Drizzle with a teaspoon of the dressing and a pinch of salt. Gently massage the kale for 30–60 seconds until slightly tender and darker in color.
Build the base: Add the arugula to the bowl with the kale and toss lightly to combine.
Slice the fruit: Thinly slice the apples.
If prepping ahead, toss the slices with a little lemon juice to prevent browning.
Toast the nuts: Warm a dry skillet over medium heat. Add pecans or walnuts and toast for 3–4 minutes, stirring often, until fragrant. Remove from heat and cool, then roughly chop.
Assemble the salad: Add apples, dried cranberries, red onion, and nuts to the greens.
Sprinkle with crumbled feta or goat cheese.
Dress and toss: Drizzle about half the dressing over the salad and toss gently to coat. Add more dressing to taste. You may not need it all.
Finish and serve: Top with optional pomegranate arils or pumpkin seeds for extra color and crunch.
Serve right away, or let it rest 5–10 minutes for the flavors to meld.