Cook the Pasta: Bring a large pot of salted water to boil. Add the fettuccine (or linguine) and cook according to the package instructions until al dente. Reserve 1 cup of pasta water, then drain and set aside.
Prepare the Sauce: In a large skillet, heat olive oil over medium-low heat. Add minced garlic and sauté for about 1 minute, just until fragrant.
Make It Creamy: Pour the heavy cream into the skillet with the garlic. Stir continuously while bringing the mixture to a gentle simmer. Add the grated Parmesan cheese, stirring until melted and the sauce begins to thicken.
Add Flavor: Stir in the lime juice, lime zest, and chopped cilantro. Season with salt and pepper to taste. If the sauce is too thick, gradually add reserved pasta water until you reach your desired consistency.
Combine Pasta and Sauce: Add the cooked pasta to the sauce in the skillet. Toss until the pasta is evenly coated with the creamy cilantro lime sauce. Allow it to cook together for another 2-3 minutes on low heat to incorporate the flavors.
Serve: Plate the creamy cilantro lime pasta in bowls. Garnish with extra cilantro and lime slices for a fresh burst of flavor.
Notes
For a spicier kick, consider adding red pepper flakes.