Hi. We adopted a two and three year old, one of whom also became a bit fussy during meals, even though he was not a fussy eater at the foster carers’ house. This only lasted a couple of weeks. We think it was due to our cuisine being very different to the foster carers (we are Mediterranean while the foster carers are Asian) and also part of the settling in process.
To be honest with you the strategy we applied was different to the one suggested by Serrakunda. We simply continued to cook the food we normally eat and we regularly explained to him why it’s so important to eat vegetables and other healthy foods (e.g. it will make him grow taller, be stronger, run faster, he won’t get sick as much). We eat together each day as a family at the table (at 6pm) and he sees us eating the same food that he eats, which I think helps as kids tend to follow your example. We also involved him in helping us to prepare meals, made meals fun and helped him when needed (for example, by feeding him and making car/train noises to help him eat those foods he initially disliked, which he responded well to). He now eats everything we cook (including broccoli, salad, and other foods kids tend not to like as much).
Another thing we did was to introduce soups regularly as part of their diet, to ensure they are eating a good amount of vegetables. We also explained to him that if he didn’t eat the ‘healthy’ foods he wouldn’t be able to have sweet snacks the following day (or desert if we had prepared some). This might be more of an ‘old-school’ approach, but it has worked for us.
Another thing to keep in check is how much food your little girl is eating throughout the day. It’s important to monitor the amount of snacks kids have throughout the day (especially sweet snacks), as they might stop eating the most important foods/meals.
I think it’s important to set out good eating habits right from the beginning (this is also a big part of setting boundaries) as giving your little girl just the foods that she likes might backfire spectacularly in the future.