In a saucepan over medium heat, combine soy sauce, brown sugar, honey, garlic, ginger, and lemon juice. Bring to a boil. Dissolve the cornstarch in the water and add to the pan. Cook over medium heat until the sauce thickens. It takes a few minutes until it gets syrupy and thick.
Prepare the crumbs. Heat oil in a saute pan. Add crumbs and pistachios. Stir cooking for 2 minutes until crumbs are toasted. Season with salt if needed.
Drizzle some oil on a baking sheet or baking pan. Place salmon fillets on top. Cover generously with sauce. Bake for 18-20 minutes. Top with crumbs before serving.
Notes
The sauce can be prepared a few days in advance in the fridge or frozen.The crunch can be frozen too.You can replace the homemade teriyaki with store-bought and just prepare the pistachio crunch.