Meal planning is something I need to get better at. With DS leaving for school, our biggest eater has left since DH and I are both trying to lose weight right now. DD2 is also home, but she's a grazer, so never eats big meals.
Right now I eat the same thing every day for lunch - an apple, a tomato and some cottage cheese. It is low in calories and I'm enjoying it. I figure at some point, I will get sick of eating the same thing every day, but for now it works. I usually have a snack at work around 3:30 or so to get me through to supper. Lately, that snack has been a pack of Buddig meat. Probably not the best, but it gets some protein and is easy.
Since our family dynamic started changing (about 6 years or so ago now), I've struggled with dinner plans. When all the kids were home, I had to be pretty organized with it, but I guess I had a hard time adjusting. I'd love to get a good rotation of meals again, but right now, I just make whatever we have on hand to cook. Since the quarantine, I've actually gotten better at a general idea for the week, because I don't want to be running to the store each night for find something to eat. I try to roughly think of what we might eat for the week and do a grocery pickup order.