This fruit, like quince, is only edible when it's processed. The oranges have more seeds than any other citrus I've seen, and the rinds are kind of tough, so they soaked last night with the seeds and pulp in a muslin pouch. Later today I'm going to boil them for a few hours. I'll finish the marmalade tomorrow. But I love the bittersweet flavor. I used to get Frank Cooper's Oxford Marmalade, but then I noticed they use high fructose corn syrup and other odd ingredients. This marmalade is just fruit, sugar and a few additions like star anise, vanilla bean or rum. I usually make a couple batches with various flavorings. One recipe called for coffee, but I sort of feel like after 3 hours of chopping these rinds, I'm not about to take the risk of making something I'm not sure I will like.