My 2 year old used to eat anything and everything. She was a great eater. Then she got fussy. She used to love pasta, now i get a screaming fit if I try and feed it to her. She loves white rice, but refuses point blank to eat it if it has a sauce on it. She does like her veggies and fruit, but is not in love with meat, unless it is a chicken nugget and then it is debateable whether it is actually meat.
I am basically lazy and refuse to cook 2 different meals every night unless we are having a curry or something really spicy, otherwise she gets what we get and if she refuses to eat it, then she is the one who is missing out. If she refuses to eat it, there is nothing else for dinner, not even fruit. Yup, at least twice a week she goes to bed not having eaten anything and it doesn't seem to bother her in the slightest. I figure if she is energetic and growing then she is getting enough.
I could let it bother me, and yes sometimes it really does, but I figure she will grow out of it.