1 tablespoon unsalted butter
1 tablespoon olive oil
1 shallot, finely chopped
4 cloves garlic, minced (about 1 1/2 tablespoons)
1 pound large shrimp, peeled and deveined with tails on (fresh or frozen and thawed)
1 teaspoon kosher salt
1/2 teaspoon red pepper flakes
1/4 teaspoon black pepper
1/4 cup low-sodium chicken broth or white wine
Zest of 1/2 lemon
1/4 cup freshly squeezed lemon juice
1 1/2 pounds zucchini noodles (from about 4 medium zucchini)
1/4 cup chopped fresh parsley leaves
2 tablespoons freshly grated Parmesan