Baked Asparagus with Balsamic Butter Sauce

SOOO good, SOOO easy, SOOO flavorful! LOVED them! Thanks to The Sister's Cafe for this recipe!
(we had it with Blackened Chicken and Individual Potato Gratins....an awesome combination of flavors!!!)

Ingredients:
1 bunch fresh asparagus
cooking spray
salt and pepper to taste
2 T. butter
1 T. soy sauce
1 t. Balsamic vinegar

Directions:
Preheat oven to 400 degrees. Snap ends off of washed asparagus and place on baking sheet. Coat with cooking spray and season with salt and pepper. Bake for 12 minutes or until tender. Melt the butter in a sauce pan or in the microwave. Stir in soy sauce and Balsamic vinegar. Pour over baked asparagus and serve.