If the rice with mayonnaise thing isn't a joke, I recommend seasoning the rice well (try to use brown instead of white) and try to get cheap potatoes and discount bread (day old or something). Take condiment packets from fast food places too,sometimes you can even find butter and such. As a fatty lover I'm sure you're familiar how important flavor is, be creative with just toasting, seasoning and browning what little you have to stretch out. Remember too when you can get meat and/or eggs of any kind, chop it up into a hash with cheap vegetables like onions with or make a soup with vegetable scraps (you can make a stock with peels etc too) and rice. Hope this helps!
It’s no joke lol, and thanks a lot for the tips! For real, I’m good at eating food but not at making it so this really helps to have ideas of what to do with my small budget