Panettone panzanella - Stefano Faita

Ingredients

• 2 tablespoons butter
• 1 Granny Smith apple, quartered, cored, cut into 1/2-inch-thick slices
• 1/2 cup Stefano extra virgin olive oil
• 1/3 cup apple cider vinegar
• 1/4 cup finely chopped shallots
• 1/2 cup apple cider
• 9 cups ¾ inch cubes of Stefano traditional panettone
• 1 10 to 11 ounce head of radicchio, halved, cored, thinly sliced
• 1 lb small Brussels sprouts, trimmed, quartered lengthwise
• Fresh pomegranate seeds (optional)