Here's a recipe for you, while we still have tangerines around. After making my rhubarb and tomato jam, I was still in the mood to try other fruit flavors. Personally, I like citrus marmalades... But a lot of people find them too bitter. But, since I was making this myself I could control the bitterness by adding the right amount of tangerine peel. You can omit the peel altogether if you don't want any biterness whatsoever, or just add very fine little slices.