First make sure you wash them really well, they tend to have a lot of dirt on them.
Then cut the stem off and slice them in half lengthwise.
Preheat your oven to roast to 450-degrees. Place them on a sheet pan and toss with olive oil, minced garlic, salt, pepper and red pepper flakes. Use as much or as little red pepper flakes as you like.
Place into the oven for about 15-20 minutes or until a knife goes through smoothly.