Marinated Lemon-Tarragon Cauliflower Salad

Whisk lemon zest and juice, Dijon mustard, chopped tarragon, honey, salt, and pepper together in a small bowl. Pour in olive oil slowly, whisking until marinade emulsified; set aside.

Bring a medium pot of water to a boil, and working in batches, blanch the cauliflower until just tender, about 2 minutes. Drain and transfer to a large resealable plastic bag. Add marinade to the bag, seal tightly, and massage the florets until all are covered with the marinade. Chill in the fridge for 4 hours. Overnight is even better.

Remove cauliflower from the bag, place in a large bowl, and add apple, Cheddar cheese, cucumber, celery, and red onion, tossing gently to combine. Garnish with tarragon leaves and serve.