Switching to a plant-based diet to save on food costs realistic or too tricky?

Lately, I’ve been thinking about cutting down my grocery bills, which are hovering around $400 a month for just me. I read that switching to a plant-based diet can save money since beans, rice, and veggies are cheaper than meat and dairy. I tried going fully vegan last week but found myself craving snacks and meals that felt way too bland or complicated to cook after work. Plus, I’m worried about missing out on key nutrients without spending extra on supplements. I want to stick to a budget but also keep my meals enjoyable and simple. Has anyone successfully shifted to a mostly plant-based diet primarily to save money? How did you handle the initial transition, and do you have go-to affordable meals that don’t feel like a diet sacrifice? Also, how do you make sure you’re getting enough protein and other essentials without breaking the bank?