Baked Asparagus with Balsamic Butter Sauce

(recipe from AllRecipes.com)

Serving size: 4

INGREDIENTS:
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 (this can also be prepared in a toaster oven).  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.