Wiktionary
tiger bread
n. A bread made with sesame oil and with a pattern baked into the top made by painting rice paste onto the surface prior to baking.
Wikipedia
Tiger bread
Tiger bread (also sold as Dutch crunch in the US, tijgerbrood or tijgerbol in Netherlands, and tiger bread in most supermarkets throughout the United Kingdom) is the commercial name for a loaf of bread which has a unique mottled crust. Within the United States, it is popular in the San Francisco Bay Area (as "Dutch crunch"). In the Netherlands the bread can easily be found in most bakeries and supermarkets, such as Jumbo and Albert Heijn.