How to Make It
Peel and section oranges over a bowl; reserve. Squeeze membranes over a bowl to extract juice. Whisk together 2 tablespoons juice, oil, vinegar, honey, salt, and pepper in a bowl.
Arrange orange sections, endive, radicchio, and fennel on a large platter. Sprinkle with hazelnuts, mint, and shallot. Drizzle with juice mixture.