just gradualy introduce solid food its trial and error you wont know what restricts you until you try, the food markers to avoid are bread, rice, pasta, red meat. some banders can eat these foods before a fill but its not advisable.
two key factors thats very important to remember is to EAT SLOWLY as if you put the food in the pouch quicker than it can pass through the band hole its similar to blowing up a balloon, the balloon would bust we are "sick".
the second this is to CHEW WELL as if the food isnt chewed enough big lumps of food thats not been broken down enough will just block the band hole similar to a blocked plug hole which will also make you vomit if food is continued eating after this occurence.
maybe try a small tennis ball sized jacket potato with either baked beans or tuna as a filling make sure the skin is chewed well if you desire to eat it.
follow the above rules and you will be fine, and STOP eating when the pouch feels full as going past the "feeling" will also result in vomiting.
liz x