What can I give my one year old for iron?

She’s low on iron. Her red cells are low, we’re taking her weekly to her pediatrician to see if it increases or decreases... but meanwhile I want to see what I can get her for it to increase. Side note : she doesn’t like milk or vegetables. She stopped wanting milk as soon as she turned one. Shes now a year and a half. I’ve tried EVERYTHING. They recommended me to try Pediasure but I’ve read that it will have her gain weight. She’s already a little on the chubby side.. but if that’s the only thing that will help her then I’m in for it.. just want to see if theirs anything else I can give her .. Any recommendations?