Trim woody bottoms off of asparagus and discard. Slice asparagus diagonally into thirds and place on the side.Slice spring onions or green onions in ¼ inch slices and place on the side separate from the asparagus.Melt butter in a medium pan over medium heat, once butter begins to bubble add spring onions and sauté until they begin to soften. 2-4 minutes.Add asparagus and sprinkle with salt and fresh cracked black pepper and toss around in the pan to coat each piece of asparagus with butter.Saute uncovered for 7-10 minutes or until pierced with a fork easily.