Lentils, like in a daal, really does it for me.
But mostly I'm just used to feeling hungry before I eat. It's not painful, that's just what a healthy appetite feels like. I find having a regular regimen helps cut out the second guessing.
Disclaimer that I don't know what you're eating. Maybe you just aren't eating enough. Maybe you aren't drinking enough water.
Haha as always, you do what you can