Oh! You live in my neighborhood (found your journal by way of Will Shetterley's).
The purple potatoes are no different than any other potato. You can boil 'em, fry 'em, bake 'em... You name it, they're tasty. IIRC they lean more towards a red bliss type of texture than a russet texture, so if you like waxy potatoes they're a decent substitute (this would explain why my mom rarely bought them, since she prefers russets).
There aren't often stir fry greens at the market unless they're in season. If you walk up to Von's, they usually have decent bok choy. I'm not sure what ha choy is, but it sounds like it might be related to "choi sum" which is a plant with ridged green stalks and small yellow flowers. If the stall vendor said you could stir fry it, I'd start there :). Everyone who sells at the market has a pretty fair notion of how to cook. It might also be broccoli rabe/raap/rape, and that's a good stir fry target too. Now I'm cursing my going thud this afternoon, since I rather like brocoli rabe, and I'm in the mood for stir fry.
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The purple potatoes are no different than any other potato. You can boil 'em, fry 'em, bake 'em... You name it, they're tasty. IIRC they lean more towards a red bliss type of texture than a russet texture, so if you like waxy potatoes they're a decent substitute (this would explain why my mom rarely bought them, since she prefers russets).
There aren't often stir fry greens at the market unless they're in season. If you walk up to Von's, they usually have decent bok choy. I'm not sure what ha choy is, but it sounds like it might be related to "choi sum" which is a plant with ridged green stalks and small yellow flowers. If the stall vendor said you could stir fry it, I'd start there :). Everyone who sells at the market has a pretty fair notion of how to cook. It might also be broccoli rabe/raap/rape, and that's a good stir fry target too. Now I'm cursing my going thud this afternoon, since I rather like brocoli rabe, and I'm in the mood for stir fry.