Colourful and tasty, tangy and sweet.
Vinaigrette: Whisk together balsamic vinegars, parsley and mustard in a small bowl. Gradually whisk in olive oil. Season with salt and pepper. (Dressing can be made one day ahead; chill. Bring to room temperature and whisk again before using.)
Croutons: Preheat oven to 375 degrees. Rub baking sheet with a small amount of oil using a paper towel.? Toss bread with the olive oil in a medium bowl, adding more oil to thoroughly coat the bread, if necessary. Sprinkle with salt and pepper. Toss with cheese, pressing cheese to adhere to bread. Scatter croutons on baking sheet and bake for 8 to 10 minutes, or until lightly browned. Cool on sheet. (Croutons can be made 8 hours ahead. Let stand at room temperature.)
Divide greens (arugula) among 8 plates. Top with avocado, onion, oranges, pomegranate seeds, dressing and croutons. Serve remaining dressing on the side.