Creamy Shrimp Alfredo Pasta with Parmesan and Garlic

Ingredients

• 12 oz (340 g) fettuccine
• 1 lb (450 g) large raw shrimp, peeled and deveined
• 1/2 teaspoon kosher salt, plus more for pasta water
• 1/2 teaspoon black pepper
• 1 tablespoon olive oil
• 3 tablespoons (42 g) unsalted butter
• 5 garlic cloves, minced
• 1 cup (240 ml) heavy cream
• 1 cup (95 g) freshly grated Parmesan cheese
• 1/4 cup (60 ml) reserved pasta water, plus more as needed
• 2 tablespoons chopped fresh parsley
• 1 teaspoon fresh lemon juice, optional