Mix tamari, 2 tablespoons olive oil, honey and sesame oil in a small bowl. Put salmon fillets in a ziploc bag and pour marinade over.
Let sit for 15 minutes. Meanwhile preheat the oven to 375 degrees.
Toss bok choy with 1 tablespoon olive oil and 1/4 teaspoon salt, then rub leeks with remaining 1 tablespoon olive oil and 1/4 teaspoon salt. Put onto a oiled sheetpan, and place salmon on top of the vegetables. Bake for about 10-2 minutes, or until salmon flakes, and is still "bouncy" in the thickest part.
Divide leeks, bok choy and spaghetti squash between plates, then top with salmon. Drizzle with a bit more olive oil, sesame seeds, and dash of salt.