Heat a frying pan over medium heat. Add: 1/3 of the canola oil and all of the shallots. Cook for 3 min until sizzling. Add: 1/3 of the salt, and the shiitake mushrooms (stir). Cook for 5 min until soft. Meanwhile, in a bowl, mix: the soy sauce, mirin sauce, rice vinegar and the sugar. Add to the bowl: the cooked shiitakes, and the sesame oil (stir). Set aside.