I am over 18 months out from the the same surgery. I can eat just about anything, as long it is in small meals (four or five meals a day). Eating slowly and in small bites is also helpful.
In general I avoid high carbohydrate items and highly fibrous meats. The days of porter house steak dinners are gone. (I can live with that. Its a fair trade off for being alive.) I am happy with one or two bites of my wife's steak. I am OK with ground meats and most seafood.
I do best when I my meals are high in protien. If I have a carb (crackers or bread), I eat a protien with it, e.g. cheese, peanut butter, meat, fish, etc. If I have cake, donuts, cookies or a cocktail I keep the serving very small and make sure I keep to my protien rule. These high glucose index foods can tear me up.
I also avoid carbonated drinks. Tomato sauce, for some, reason does not like me anymore (I eat alfredo now).
Spicy foods in moderate amounts are not a problem, although doctors and nutritionists suggest you avoid them.
In the end, finding out what you can eat is pretty much trial an error. (Unless you listen to the nutitionists who will put you on bean sprouts and chicken salad.)
The down side of not watching what you eat is dumping syndrome which includes nausea, gas, cramps, and diariaha. An episode makes you a believer very quickly.
I also had to try several different antacids to find the one that worked best for me. Most did not last 24 hours, even at two a day.
Good luck