The original recipe where I got this from recommends using spinach which is also great, but kangkong is more readily available and cheaper.
This is a super simple pasta dish. All you do is sauteed minced garlic, I like mine very garlicky so I use a whole garlic head, then add kangkong leaves. Cook until leaves wilt then just add some chili flakes and the cooked pasta, mix everything together. Then serve with parmesan cheese.