Op if using a normal gas oven, with cook top etc.
Preheat oven and a large pan (the broiler pan will do) to the desired temp prior to placing loaf(S)
Just prior to placing loaves in oven pour boiling water in said pan. Cook as desired.
Make sure to 'score' the top of the loaves to give them the ability to expand without tearing the gluten cells. Oven raise should be about 10 percent.
Simple really
E. G.