Bring the maple syrup to a boil and cook for 1 minute. Add the soy sauce and continue cooking for another 2 minutes. Jar immediately. Keeps for several weeks in the refrigerator.
According to Chartier: "It will be useful above all for your summer grills, whether they are meat, fish, shellfish or vegetables. In dessert mode, it can enhance a dark chocolate recipe like no other. Then it gives the harmonious note to some of our recipes in this book." If you don't know this book, it's a must-have, run and buy it. :)