In a large mixing bowl, combine the capers. Using a fork, mash them lightly to release their briny flavors.
Add the garlic, dates, parsley, sumac, salt, pepper, lemon zest, lemon juice, and olive oil to the bowl. Whisk these ingredients together until fully combined.
Gently fold in the butter beans, olives, and shallots. Toss everything together carefully to ensure the beans don’t break apart.
Let the salad sit at room temperature for about 10 to 15 minutes to allow the flavors to meld beautifully.
Prepare the asparagus. Blanch it by placing it in a microwave-safe bowl, covering it with plastic wrap, and microwaving for about three minutes on high.
Transfer the cooked asparagus to an ice bath to stop the cooking process and retain its color.
Once cooled, drain the asparagus and add it to the mixing bowl with the other ingredients. Toss gently again.
Add the mint and hazelnuts to the bowl. If you’re toasting the hazelnuts, do this in a dry skillet over medium-high heat.
Stir everything together and taste for seasoning balance. Adjust with more salt or pepper if needed.
Serve immediately or chill in the fridge for about one hour before serving for a delightful experience.