What are some non expensive healthy foods to keep in the house to help with weight loss?

I'm not new to healthy foods or anything like that but I'm in college and I live at home with my mom. Shes Typically the one who goes grocery shopping and I never know what to ask her to get. I struggle trying to find things to eat at home that are even some what healthy. I tried meal prepping for and while and I hate it!

If you guys could just share some ideas or maybe even what your grocery list looks like that would be super helpful!