Preheat oven to 400 °F and line sheet pan with parchment paper
Start by cutting off the top and bottom of the squash
Then slice the squash in half the long way. The easiest way I have found to do this is to stand it upright and slice down placing pressure on both sides of your knife. I also recommend using a large butcher's knife.
Once you have your halves, use a kitchen spoon to scoop out all of the seeds. (you can roast these with salt just like pumpkin seeds if you want to)
Grab one half and use the hallowed part of the squash to grip while you peel the skin off using a vegetable peeler. (I recommend the Y peelers that are relatively cheap off of Amazon)
Once your squash is naked and gutted, the rest is up to you. You can cut it into slices or cubes or whatever your heart desires. I like to eat butternut squash in bowls with chicken, Brussels sprouts, and rice so I cut mine into cubes. (keep in mind, the bigger your sections, the longer it will take to cook)
Place all of your squash pieces into a bowl and drizzle with olive oil. Then spread evenly onto a parchment paper lined sheet pan and sprinkle with salt, pepper, and paprika.
Place pan in the center of the oven and let cook for 30 minutes. After 15 minutes take them out, flip/stir them up so that another side can get crispy, and put them back in for 15 more minutes. After 30 minutes they should be fork-tender rand delicious. (if your pieces were larger cook for longer in 5-minute increments until fork-tender. Enjoy!