Step 1

Bring a large pot of water to a boil over medium-high heat and season generously with salt. Add the fettuccine and cook, stirring occasionally, until the pasta is barely tender, about 12 minutes. Reserve 1/4 cup of pasta water, then drain the pasta well and reserve the pot.

Step 2

Meanwhile, combine the avocado, cream, garlic, 1/2 cup pecorino, 2 teaspoons salt and several grinds of pepper in a blender and blend until very smooth, scraping down the sides of the carafe with a rubber spatula as needed.

Step 3

Pour the avocado sauce into the pot the pasta cooked in and place over medium heat. Cook, stirring constantly, until the sauce is warmed through and just simmering, about 5 minutes. Add the pasta and reserved pasta water and toss to coat. Taste and adjust seasoning with more salt and pepper if needed.

Step 4

Transfer the pasta to a large serving bowl. Top with the lemon zest, basil and a sprinkle of pecorino. Serve immediately.