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