yes it's really only walking at this point, you may get clearance about 5-6 weeks to start doing gym activities but some including an crunches and sit ups can cause real issues with the band (and from experience if hurts ... A LOT!)
Mashed stages
Porridge, ready brek, weetabix
Scrambled eggs
Mashed vegetables, white fish, tuna,
Baked beans (if you're not limiting carbs you could have the inside of baked potato or mashed potato)
Mashed swede and carrot.
Tinned ratatouille (tescos do one which is great for mash stage)
Low fat custard, stewed fruits.
Low fat rice pudding mashed up a bit more
Thicker yoghurts
Thicker soups
Make home made stew and blitz it