Cut the stem end off the brussels sprouts and depending on size either half or quarter them and put in a pile on the baking sheet
Peel and cut the butternut squash into cubes about the same size as the brussels sprouts and add alongside
Toss everything together with the olive oil
Add whatever seasoning you want to use, salt and pepper usually for me but feel free to add dried herbs, paprika, chili flakes, cumin etc
Toss again and roast at 400deg for 30-45 minutes until the squash is tender and brussels are tender and taking on color
Serve over rice and alongside any leftover protein you have like chicken thighs!