Vegetable Tabbouleh With Chickpeas

Name: Vegetable Tabbouleh With Chickpeas
Ingredients: 1 1/4 cups medium bulgur wheat; Boiling water, as needed; Kosher salt and black pepper; 2 tablespoons minced shallot; 2 tablespoons Dijon mustard; 1 tablespoon fresh lemon juice; 1/4 teaspoon grated garlic; 6 tablespoons extra-virgin olive oil; 2 Persian cucumbers, thinly sliced; 8 ounces asparagus, trimmed and sliced on the diagonal 1/8-inch-thick; 8 ounces cherry tomatoes, halved; 1 (15-ounce) can chickpeas, rinsed; 4 ounces fresh mozzarella cheese, cut into 1/4-inch cubes (optional); 1/2 cup coarsely chopped parsley