At least things your child is eating are reaosnably healthy, it could be worse.
Like its already been said, its important to not make too much of a fuss, if your child sees you getting stressed or upset about it, or spending too much time trying to feed them other foods, they are more likely to continue being fussy, as they are getting a reaction and attention form you.
Its hard to come up with solutions when they are still so young, you cant really explain to them why they need variety, but this will be an option in time.
Also, when they are older, it is easier to get them more involved with food, encourage them to helop you prepare it, if you have a garden, grow some veg that they can help with. If the food is appealing to a child in some way, they are more likely to eat it.
Another thing that may help, although you could do this already as far as I know, is eat at the same time, and the same foods as your child. You are the main role model, and if they see you are eating and enjoying the food they also have, it could be encouraging, and even offer them pieces from your plate first if this helps.
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