if you dont want to put on weight, u can either fast through your PWO mealtime or you may want to consider eating a carb-restricted meal...
like lean meat with nuts, some
veggies and olive oil...
CONCLUSION: Limiting carbohydrate, but not energy intake after exercise (carbohydrate deficit) resulted in increased non-oxidative glucose disposal, decreased carbohydrate oxidation and increased fat oxidation during the glucose infusion, compared to baseline, indicating a favorable shift in energy metabolism. Creating a carbohydrate deficit, by withholding expended carbohydrate but not energy following exercise may be a sensible strategy to promote favorable gains in insulin action that requires further evaluation.
If you want to put on weight, then you should be pretty much eating anything paleo you can get your hands on.