How to deal with overbearing mother???

🐘🐘🐘 β€’ πŸ‘§πŸΌ born 1/19/16. πŸ‘ΌπŸΌ lost 9/15/17. πŸ‘ΌπŸΌ lost 11/26/17.
My mother is being super duper annoying about wanting to start my 3 month old EBF daughter on solids. We argue about it every day because I want to wait until she's at least 5 months old. She calls me greedy, selfish, first time mom, Etc every time. It doesn't help that she wants to start her off on BEANS of all things. She has already sneaked the baby some beans once, Β I don't doubt she'll keep doing it. I live with her so I can't just get away. We normally have a pretty close relationship. Can anyone give me advice on how to address this?