Ribbony Shrimp and Pasta Scampi

Name: Ribbony Shrimp and Pasta Scampi
Ingredients: Kosher salt; 8 ounces whole wheat spaghetti; 1 yellow squash; 1 zucchini; 1 pound peeled and deveined medium shrimp, tails removed; Freshly ground black pepper; 2 tablespoons olive oil; 1 cup cherry tomatoes, halved; 4 cloves garlic, finely chopped; Pinch crushed red pepper flakes, optional; 1/2 cup low-sodium vegetable or chicken broth; 2 tablespoons chopped fresh chives