I came home from the mercado today with some white potatoes, which are the only ones we can get here (other than sweet potatoes, which are available in white, orange and purple varieties). When I cut into them I saw that many of them had brown streaks that made me reluctant to use them. I've seen this over the years and never knew what this means or whether the spuds are safe to eat or good tasting.
Any ideas what this is and how potatoes get that way?