Step 1: Prep - Wash and dry produce. Halve tomatoes lengthwise. Dice mozzarella into half-inch pieces. Halve ciabatta; drizzle with olive oil and sprinkle with half the garlic powder (all for 4 servings). Toast until golden. Drain and rinse chickpeas.
Step 2: Start Dressing - In a small bowl, whisk together half the vinegar, half the mayonnaise, half the mustard, and half-teaspoon sugar until smooth. (For 4 servings, use all the vinegar, all the mayonnaise, all the mustard, and 1 teaspoon sugar.) Slowly whisk in 2 tablespoons olive oil (4 tablespoons for 4) until creamy; season with salt and pepper.
Step 3: Make Croutons (or Not!) - Dice toasted ciabatta into 1-inch pieces. Season with salt and pepper. Or use your favorite pre-made croutons if you don’t want to make them.
Step 4: Finish and Serve - In a large bowl, combine spinach, tomatoes, mozzarella, croutons, half the chickpeas (all for 4 servings), and as much dressing as you like. (You’ll have extra dressing; save for another use.) Taste and season with salt and pepper.
