Can you show me some good food habits to save money for a single adult under $500 per month ? (details inside )

What foods habits or products are cheaper, healthier, and tasty. I’m thinking fruits and vegetables, chicken and appreciating tap water , and buying from dollar stores. Also what are cheat day foods that you eat for fun like KFC and name brand pop once and a while? I have an electric frying pan and a microwave, kettle, oven and a fridge and a toaster oven?