Clean the mushrooms with a damp paper towel
Trim off the tough base
Slice lengthwise into thick pieces or rounds
Heat a skillet over medium-high heat
Add oil or butter
Place mushrooms in a single layer
Cook until browned on one side
Flip and brown the other side
Add salt and pepper
Add garlic, soy sauce, or herbs if desired
Cook until tender and caramelized
Serve hot