Radicchio Salad with Citrus Recipe

Ingredients (9)

• 3 slices (about 2 cups) sourdough bread, torn into bite-sized pieces
• 1/4 cup plus 3 tablespoons extra-virgin olive oil, divided
• 3/4 teaspoon kosher salt
• 1/4 teaspoon ground black pepper
• 1/2 cup chopped walnuts
• 2 citrus fruits, like orange, lemon, and/or grapefruit
• 1 small head radicchio (about 4 cups), cored and cut into bite-sized pieces
• 2 cups arugula
• 1/4 cup crumbled feta cheese