How to Make It
Bring a medium saucepan of salted water to a boil. Add the potatoes and cook until tender, about 12 minutes. Drain and let cool.
In a small bowl, combine the olive oil and vinegar and season with salt. Break the potato slices into quarters and spread on the bottom of a large, shallow bowl. Season with salt and drizzle with 3 tablespoons of the dressing. Layer the tomatoes over the potatoes, followed by the purslane, cucumber, onion, jalapeño, parsley and mint. Just before serving, pour the remaining dressing over the salad and toss well.
Purslane is a pesky weed to some and a tasty, unusual, tangy green to others. If you can't find purslane, substitute watercress.