Preheat oven to 425 degrees F. Place trimmed asparagus on rimmed baking sheet and drizzle with oil/butter. Roll the asparagus around in the oil/butter to coat.
Arrange mushrooms, tomatoes, and green onions on top of asparagus. Drizzle with balsamic vinegar and a little salt and pepper to taste. Roast for 6-12 minutes or until tender with a little crunch. Thinner spears of asparagus will take 6-8 minutes while thicker spears make take as much as 12-15 minutes.
When asparagus is ready, removed from the oven and sprinkle with Parmesan cheese and serve immediately.
We recommend using organic ingredients whenever possible.