Place the spinach and arugula in a large bowl. In a medium bowl or measuring cup, whisk 2 tablespoons of the olive brine with the mustard, then drizzle in the olive oil while whisking constantly to emulsify. Taste and season with salt and pepper (you might not need salt since the olive brine is salty already). Toss the greens with half of the dressing and transfer to a large shallow serving bowl. Top with the olives, mozzarella, Parmesan, artichokes, peppers, tomatoes, pear and salami. Wrap the prosciutto around the breadsticks and place them on top. Add a few drizzles of balsamic glaze (I hone in on the pear and tomatoes), then drizzle on the remaining dressing and sprinkle on the basil. Serve and enjoy!