Calamondin Orange Marmalade
Calamondin oranges are the small but plentiful fruits of a popular citrus houseplant that originated as a cross between a tangerine and a kumquat. They smell sweet, but are surprisingly tart, and make a very refreshing marmalade. This is a very simple recipe, and quite adaptable to other tart citrus such as Meyer lemon or lime. I haven't tried sugar substitutes with these, but if you have success doing so, please share your secrets with the rest of us!
Vegan