They are nice with scallops. I don't have a recipe, but you blend some in a mixer and then pass through a chinois into a saucepan. Heat, thin with a little water and whisk in a little butter. Season with salt and a touch of lemon. Take some more kumquats and cut them into a fine brunoise, or just mince them well. Cook some scallops, take them out, add a bit of butter to the pan, then the kumquats, a touch of minced ginger and chive, season, then put this mixture over each scallop. Sprinkle with sea salt and plate with sauce. Very simple and nice harmony of flavors if you season everything well.