Grilled Cauliflower Salad

Name: Grilled Cauliflower Salad
Ingredients: 1/2 cup crumbled goat cheese; 1/2 cup mayonnaise; 1/2 cup sour cream; 1/4 cup finely chopped chives; 1 Meyer lemon, zested and juiced; 2 tablespoons orange blossom honey; 1 tablespoon Champagne vinegar; 1 1/2 teaspoon kosher salt; 1/2 teaspoon fresh ground black pepper; 1/2 head cauliflower, broken into big florets; 6 organic carrots; 2 red bell peppers, seeded, deveined and cut into cheeks; 1 red onion, quartered, root end left intact; 1/4 cup olive oil; 1/2 teaspoon crushed red pepper flakes; 1 teaspoons kosher salt; 1 teaspoon fresh ground black pepper; 1 celery root, peeled and julienned; One 5-ounce package baby arugula