Lumpfish roe are dyed black to imitate beluga sturgeon caviar. This dye rubs off if you have not thoroughly rinsed the roe in a colander under cold running water. Once rinsed, dry the eggs on paper towel before using as a garnish. The effect created by the black roe is dramatic and beautiful. You can also find red lumpfish eggs.
If you don’t have a cookie cutter, use a tin can of similar size, open at both ends.