First, preheat the oven to 400℉
Wash both veggies then slice the carrots and halve the brussel sprouts.
In a large bowl toss the sliced pieces in oil, salt and black pepper.
Now, on a sheet pan lay the brussel sprouts cut side down and the carrots flat as possible.
Bake in a preheated oven for 20 minutes. When you remove them this is the time you want to toss them in something like balsamic vinegar, honey or a little brown sugar. The sweetness helps cut the slight bitterness left in the brussel sprouts.
Allow to cool a bit then serve.