Eggs. Meat (usually spam). Sometimes cheese. Veggies if I have 'em. Copious amounts of hot sauce. Mix 'em all together in a hot frying pan. Also cook up some pancakes or waffles if it's the weekend.
I usually restrict myself to one big meal per day, usually around lunchtime. I guess that'd technically be called "intermittent fasting", but it doesn't feel that way (and I cheat sometimes, e.g. because someone invited me over for dinner and I don't want to be that asshole who's like "nah I already ate").