Roasted Butternut Squash Salad

Name: Roasted Butternut Squash Salad
Ingredients: 3 lb butternut squash, peeled, seeded & cut into 1″ pieces; 3 tablespoons olive oil; 2 tablespoons brown sugar; ½ teaspoon cayenne pepper; Kosher salt & freshly ground black pepper; 2 cups sliced radicchio, loosely packed (from about ½ small head); 1 apple, thinly sliced (i used gala); ¼ cup blue cheese crumbles; ¼ cup pepitas; 2 tablespoons olive oil; 1 tablespoon maple syrup; 1 tablespoon apple cider vinegar; 1 teaspoon dijon mustard; 1 tablespoon roughly chopped tarragon, plus extra to garnish