Wash the squash and cut off the ends
Slice the squash into even pieces or cubes
Remove seeds if needed
Heat a skillet over medium heat
Add oil or butter to the skillet
Add the squash in a single layer
Season with salt and pepper
Cook for 5 to 10 minutes, stirring occasionally
Add a small splash of water if the pan gets too dry
Cook until the squash is tender
Serve immediately