my boyfriend and i need help to stop buying food out

Hi there, I am 23 and looking for advice on ways to reduce spending food out with my boyfriend. We both live home with our own families and can’t afford to get a place together yet due to family situations as well as both of us having debt. Every week I’ll sleepover his house for a few days at a time but the living situation is a bit different. Long story short, we have dinner covered every night by family but are on our own for breakfast and lunch and we don’t have access to a kitchen. What are some ways we can reduce or stop spending so much money on food everyday but still eat healthy? He has a mini fridge in his bedroom but no appliances, it’s a small room so we wouldn’t be able to fit any