Fettuccine Alfredo with Zucchini : Fettucini Alfredo

Ingredients

• 3/4 cup vegetable broth, or reduced-sodium chicken broth (see Tips for Two)
• 4 large cloves garlic, peeled
• 4 ounces whole-wheat fettuccine
• 1 small zucchini, cut into matchsticks
• 2 teaspoons cornstarch, mixed with 1 tablespoon water
• 2 tablespoons reduced-fat sour cream
• Pinch of freshly grated nutmeg
• 1/8 teaspoon freshly ground pepper, or to taste
• 3/4 cup freshly grated Parmesan cheese, divided
• 1 tablespoon chopped fresh parsley