Preheat broiler to high. Line a baking sheet with foil; coat with cooking spray. In a small saucepan combine the soy sauce, honey, and lemon juice; bring to a boil. In a small bowl combine the cornstarch with 1 tsp. water; stir into sauce. Cook, stirring, until thick and bubbly, about 1 minute. Arrange the salmon on the baking sheet; broil 10 minutes. brush with half of the glaze. Broil about 2 minutes more or until salmon flakes easily with a fork (145°F).
While the salmon is cooking, heat the sesame oil in a large skillet. Add the spinach; cook until just wilted, about 1 minute. Microwave the rice to warm. Divide salmon, spinach, and rice on serving plates. Drizzle salmon with the remaining glaze and sprinkle with sesame seeds.
Prepare 1 2/3 cups jasmine rice according to package directions. Cool, and store in the fridge.