Asparagus with Balsamic Butter Sauce

INGREDIENTS (Nutrition)
1 bunch fresh asparagus, trimmed
cooking spray
salt and pepper to taste
2 tablespoons butter
1 tablespoon soy sauce
1 teaspoon balsamic vinegar

DIRECTIONS
Preheat oven to 400 degrees F (200 degrees C).
Arrange the asparagus on a baking sheet. Coat with cooking spray, and season with salt and pepper.
Bake asparagus 12 minutes in the preheated oven, or until tender.
Melt the butter in a saucepan over medium heat. Remove from heat, and stir in soy sauce and balsamic vinegar. Pour over the baked asparagus to serve.