Fruit, vegetables and white meat for protein. Tinned salmon is good also as it contains high levels of protein and complex carbohydrates which your body needs. Another poster on this forum suggested slow release carbohydrates too which I am currently looking into. Simple carbohydrates while producing some energy will also increase your weight if you’re not careful so you have to monitor your intake of these. Limit products with added sugar - for the same reason as simple carbohydrates. There’s lots of advice out there on diet. Just eat healthily.