Dr Leslie Tay is a general practitioner, photographer, blogger and one of the leading food authorities in Singapore.

Better known by his moniker “ieat”, his pictures and stories about food appear on his award-winning food blog, ieatishootipost.sg and Facebook page.

Besides spending almost a decade roaming the island in search of the best hawker food, he has put his palette and ingenuity to the test by experimenting with making his own popular local fare from scratch and teaching others how to do so as well.

In his latest instructional video, he reverse-engineers the ubiquitous McDonald's Curry Sauce with a surprising result: He believes it is almost 90 percent like the original.

The best part? There is no cooking involved and he only uses five basic ingredients, excluding water as a solution for the mixture.

Japanese curry roux 2 cubes

Water 60ml

Peanut butter 2 Tbsp

Condensed milk 6 Tbsp (180ml)

Soy sauce 1.5 Tbsp

Japanese Vinegar 2 Tbsp

Check out the video: