Honeynut Squash With Radicchio and Miso

Name: Honeynut Squash With Radicchio and Miso
Ingredients: 3/4 cup whole grain or semipearled farro; Kosher salt; 3 honeynut squash, halved, seeds removed, or 1 acorn squash, seeds removed, cut into thick wedges; 5 tablespoons olive oil, divided; 1/3 cup pine nuts; 1 garlic clove, chopped; 1 tablespoon white miso; 2 tablespoons apple cider vinegar; 1 tablespoon thinly sliced chives, plus more for serving; 2 small heads of Treviso radicchio, outer leaves removed and halved, cores quartered; 1 Granny Smith or other tart apple, very thinly sliced