Now, wrap your French bread in foil, making sure to seal it tight. This will help trap the heat and keep the bread moist. I mean, who doesn't love a good steamy relationship between bread and oven?
Pop that wrapped bread into the oven for about 10-15 minutes, or until it's warm and toasty. You can even give it a little tap to check if it sounds hollow, like a drum. If it does, it's ready to rock!
But, be careful not to overheat it, or you'll end up with a crusty disaster. I mean, you want it to be crispy on the outside, not burnt to a crisp. That's just bread-winning, if you know what I mean.
Heating Up French Bread In Oven at Alica Martel blog