Unless I have guests, I never plan meals.
I rarely know what I'm going to feel like eating anyway and only eat when I'm hungry, so no set times either.
Living alone means I can indulge myself, listen to my body and if I want a meal of just broccoli or cauliflower, that's what I'll have.
Sometimes I'll eat once a day, other times, if I'm hungry, twice. I never eat after 4pm
It may choose porrage for dinner, or fish for breakfast, which I never eat before 10:45, even though I'm up at 6am most mornings; decaf coffee is enough until I feel hungry.
Because I am unable to shop without help, my little freezer is handy and I keep a selection of vegetables so I can get a handful to stir-fry, or make soup. With that I may or may not have fish or seafood.
If I have guests and family, then I do plan, especially desserts as my DIL loves home made cheesecake, mille feuille, chocolate mousse or brownies: all things I'd never make for myself.
It's a long time since I had a posh dinner party but I used to love planning for them.