Meal budgeting

Any ideas for meal plans on a budget? I’d like to keep it under $300/month

I’ve been keeping an eye out for meat sales but our freezer space is limited right now because of my breastmilk stash 😅 We’re considering buying a deep freezer. I looked into couponing a few years ago but it seemed like every store near me had a no stacking policy so I kind of gave up. I also work full time and have a 4 month old so I’m not sure how much time I can put towards that. We’ve also considered getting a Costco/sams club membership (or using FILs) if that might help us.

My SO is a meat and potatoes kind of guy and my daughter is a picky “eats 3 bites of a cupcake” kind of kid so it makes it difficult for me to think of cheap, healthy meals that they’ll both enjoy.

Any blogs, recommendations, advice would be appreciated!