Cook the pasta per package directions until al dente.
While the pasta is cooking, in a saucepan, add the olive oil and garlic and heat them together, allowing the garlic flavor to infuse the oil.
As the garlic starts to turn color and becomes lightly blonde, add the red pepper flakes and ground black pepper.
Stir for a few seconds, then add the chopped Yu Choy greens and salt to taste. Stir thoroughly. Don't be alarmed if the greens look like a lot-- they will wilt down quite a bit.
Cover the saucepan and let the greens cook about five minutes until they have wilted and cooked down. Add the lima beans and stir well to mix.
Add the zest, capers, lemon juice, walnuts and parsley. Now add the cooked pasta and stir everything together.Check salt and add more if needed.
You can eat as is, or drizzle some more extra virgin olive oil before serving, if you don't mind the extra calories (hey, EVOO is good for you). It's delicious either way.