Whisk together 1/3 cup light soy sauce, 1/3 cup Mirin, 1 tbsp honey, 1 tsp grated ginger and 1 tsp grated garlic. Mix the marinade ingredients and pour about 1/3 into a re-sealable plastic bag. Add the salmon fillets and refrigerate for .
If your sesame seeds are un-toasted, add 2 tbsp sesame seeds to a dry skillet and toast over medium high heat for 3-4 minutes, or until the sesame seeds are fragrant and begin to turn a golden color. Stay close and stir often.
Add sesame seeds to remaining marinade and combine with the rest of the marinade and pour into a small sauce pan. Heat over medium heat 2-3 minutes until the sauce thickens. Set aside until ready to use.
Slice 4 baby bok choy into halves or thirds, rinse under cold water, and thickly slice.
Spray a medium skillet with vegetable spray and heat over medium to high heat for 2-3 minutes or until the pan is very hot. Add the salmon, skin side up, and sear for 3-4 minutes on the first side.
Check once during the searing of the first side and then turn skin side down and sear for another 3-4 minutes, remove from skillet and set aside.
Add the marinade remaining from the salmon to the skillet, bring to a boil, reduce by half.
Place bok choy in a microwave proof dish, rinse, cover with cling wrap and heaton high for about 1 minute.