This turned out pretty good, but I’ve reduced the cooking time from 25 to 15 minutes because it was overdone.
Spray grapeseed oil
2 tablespoons butter
1 tablespoon soy sauce
1 teaspoon balsamic vinegar
Preheat the oven to 400 degrees F.
Cut off the tough ends of the asparagus, spread on a baking sheet, spray with oil, season.
Roast for 15 minutes, until tender but still crisp.
Melt butter in microwave, stir in soy sauce and balsamic vinegar. Pour over the asparagus to serve.