What foods cause your body to produce excess gas?

Cauliflower and broccoli are bad ones for me. Dried beans also really bad. That was until a friend of mine told me the secret to stopping foods making you gassy, and it's easy and cheap.
When you boil the veges, add some bicarb soda to the water. It doesn't affect the taste at all and you just don't get gassy. Give it a try, you'll love it.