Step 1

Bring a pot of water to a boil and season with salt. Cook the pasta until al dente according to the package instructions. Reserve 1/2 cup pasta water, then drain and set aside.

Step 2

Heat the butter in a skillet over medium heat until melted and frothy. Add the shrimp, garlic and scallions. Cook until the shrimp are plumped and almost cooked through, 7 to 9 minutes. Add the red peppers and lemon zest and juice, followed by the cream and a splash of the pasta water. Bring to a simmer. Add the pasta and cook until thickened, 2 to 4 minutes. Finish with the Parmesan, fresh oregano and chile flakes.