Cook the pasta in a large pot of boiling water until al dente.
Meanwhile, place the spinach, sour cream or crème fraîche, Parmesan, salt, garlic powder, lemon juice, and zest in a food processor and blitz until a smooth sauce is formed.
Cook the pasta according to package instructions in a large pot of generously salted water.
Parmesan and lemon crumbs:
Place a frying pan on a medium-high heat and add the olive oil.
Add the breadcrumbs, lemon zest and garlic powder when the oil is hot and toast for a few minutes until the crumbs begin to brown.
Remove the pan from the heat and transfer the toasted crumbs to a bowl.
Stir in the grated Parmesan.
Combine the sauce with the freshly boiled pasta.
Sprinkle the lemon and parmesan crumbs on top and enjoy