Spring Vegetable Ragout

Name: Spring Vegetable Ragout
Ingredients: 1 small yellow summer squash, quartered lengthwise, then cut into 1/2-inch pieces; 16 grape or cherry tomatoes, halved; 2 tablespoons minced fresh basil leaves; 1/2 cup vegetable broth; 4 ounces sugar snap peas, halved crosswise (1 cup); 4 ounces whole-wheat spaghetti; 3/4 cup finely grated Parmesan cheese; 1 small leek, white and pale green parts only, halved, washed and thinly sliced; 1 tablespoon extra-virgin olive oil; 1/4 teaspoon freshly ground pepper