1/3 cup freshly grated Parmesan cheese 5 tablespoons extra-virgin olive oil 2 tablespoons fresh lemon juice 1 teaspoon finely grated lemon peel 4 cups (packed) baby arugula 1 cup halved cherry tomatoes Blend first 4 ingredients in processor. Season dressing with salt and pepper. Transfer to bowl. Cover; chill up to 3 days. Combine arugula and tomatoes in large bowl. Toss with enough dressing to coat.