I'm not really an AI in everything person, but weirdly: I'm an avid cook. I own well over a hundred cookbooks. I've been cooking for literally decades. Putting aside humility, I'm pretty comfortable just opening the fridge and making something on demand and it usually ends up pretty good and interesting. (usually. ;-)

And I find meal planning to be a drag. I don't like it. But it's really helpful in saving time over the week. I find myself using gemini once in a while to get ideas to kick me out of a boring routine or when I'm feeling unmotivated, and it's pretty helpful. Probably most helpful because it gets the ball rolling -- dealing with the "blank page" problem is hard in all sorts of domains, including meal planning. I don't actually like the idea of the OP's app -- I like to have more control and iterate a fair bit -- but I can appreciate the general area.