I’ve made this sautéed brown champignon mushrooms with orange bell pepper as side dish for fish dish. Few days ago I cooked Salmon Teriyaki served with parsley mashed potato and this sautéed mushrooms as side dish. It’s easy to make and quiet fast to prepare it. Here I used spring onion, but you can substitute it with onion. I’ve used orange bell pepper because the color looks nice to combine it with the brown color of Champignon mushrooms. You can also use red or green bell peppers.