Roasted Asparagus w Balsamic Browned Butter

2 lbs asparagus spears, trimmed
1/4 t salt
1/8 t pepper
2 T butter
2 t soy sauce
1 t balsamic vinegar

Preheat oven to 400. Arrange asparagus in a single layer on baking sheet.  Coat asparagus with cooking spray.  Sprinkle with salt and pepper.  Bake for 12 min or until tender.  Melt butter in a small skillet over medium heat. cook 3 min or until lightly browned, shaking pan occasionally. Remove from heat; sir in soy sauce and vinegar.  Drizzle over asparagus, tossing well to coat.