Nimberberry Jam is made of nimberberries, check their slide for more. This orange jam is versatile and used in many Axolotlian dishes, here are but a few:
Toast, put on toast, simple. Sandwiches, also simple. Straight up, it's so good and healthy people eat it with a spoon. Bagels! Pastries, it is used as filling in many pastries from tarts to jelly donuts, and also baked into muffins and cakes. Those are only the most obvious uses, it can be used in anything other jams are used in.
Although one very Axolotlian use for it is to put it in The Axolotlian (smoothie).