What to eat before taking Lithium?

Do you eat before you take Lithium? If so, what do you usually eat/how much? I’ve been on Lithium for a while now, and my doctor has gradually had to increase my dose over the years. I take it at night (like 9 pm ish) because it makes me tired, and I have always eaten something small, usually a granola bar, with it to avoid getting sick. I (relatively) recently have gotten increased to 900 mg a day, and I take it all at night. A granola bar just isn’t cutting it anymore, I’m still getting really nauseous after I take it. I don’t really know what else to eat before taking it though, or how much? I don’t want to eat a whole meal before going to bed you know? I know I probably just need to play around with it and eat different things. I was just curious what works for other people.