1/4 cup chopped hazelnuts  | 
                                                1 1/2 tablespoons light brown sugar  | 
                                                1 1/2 teaspoons egg white  | 
                                                1/8 teaspoon salt  | 
                                                cooking spray  | 
                                                2 teaspoons fresh orange juice  | 
                                                1 1/2 teaspoons toasted hazelnut oil  | 
                                                1/2 teaspoon dijon mustard  | 
                                                1/4 teaspoon salt  | 
                                                1/4 teaspoon freshly ground black pepper  | 
                                                1 (7-ounce) package fresh baby spinach (about 8 cups)  | 
                                                1 cup orange sections (about 4 oranges)  |