Blanch the asparagus - Bring a pot of salted water to a boil. Add asparagus and cook for 1–2 minutes until bright green and just tender-crisp. Transfer immediately to an ice bath, then drain well and pat dry.
Massage the kale - Add chopped kale to a large bowl with 1 tbsp olive oil and 1 tsp salt. Massage with your hands for 2–3 minutes until softened, darker in color, and slightly tender.
Make the dressing - In a sealable jar, combine olive oil, lemon juice, mustard, maple syrup (or honey), and minced shallot. Shake vigorously until emulsified.
Assemble your salad - To the bowl with kale, add blanched asparagus, matchstick apple, raspberries, sunflower kernels, and pistachios.
Add crumbled feta. Drizzle dressing just before serving and toss gently to coat, keeping raspberries mostly intact.