Bring a big pot of salted water to a boil and cook the pasta according to directions.
Drain quickly, reserving a bit of cooking water, and set aside.
Heat a heavy-bottomed 12″ skillet over medium heat and toast the pine nuts until they start to turn golden and fragrant. Pour them out of the skillet and save for later.
Return the skillet to medium heat and pour in a tablespoon of olive oil. Sprinkle in a big pinch of red pepper flakes and the garlic and stir.
Once the oil is hot enough to shimmer, toss in all of your collard greens.
Sprinkle the greens with salt. Stirring often (try not to let them clump), sauté the greens for about three minutes.
Remove the pan from heat. Scoop the greens into the pasta pot and toss with another drizzle of olive oil, adding pasta water if necessary.
Divide onto plates, top with pine nuts and Parmesan shavings and serve with two big lemon wedges per person.