When I hit 40-ish my appetite definitely diminished (which, I guess is a good thing? I'm still at about the same weight, so it's all balancing?) and I stopped eating breakfast several days per week, because I'm not hungry for breakfast. Except on days when I exercise first thing in the morning -- then I get hungry about 45 to 60 minutes after I finish.
So most days,
Coffee, sometimes nibbles of whatever I'm making the kids for school lunches.
More coffee, start drinking water if I remember, sometimes cocoa (not very sweet -- I make it with milk, sugar, and cocoa powder)
Lunch around 11 (except earlier if there was early morning exercise, as mentioned above). Usually leftovers. Sometimes I make a giant chopped salad with nuts and cheese and eat that for several days, with or without toast (pb or stinky blue cheese on the toast, typically)
Afternoon snack: coffee, water, fruit, sometimes a bowl of cereal if we're out of everything else I feel like. We always have homemade granola and yogurt.
Dinner is the big meal: some protein source, some carbs, lots of veg. Meat a couple times per week. This varies all over -- looking at the menu for the last week I see: (1)black bean, corn, and avocado salad with chipotle and lime dressing with chips, (2)pork chops with potato salad, cabbage and homemade sauerkraut, (3)turkey'n'summer squash "burgers" (from the Jerusalem cookbook,I believe) with various leftover veg and avocado toast, (4) green bean & tortellini salad with tomato pesto, (5)corn tortilla casserole with eggs, black beans and green chilis and slaw.
I have an active family that includes two teenagers, so the # of meals thing is more so that I'm sated (but not overfilled). Food is our second-largest budget item, after the mortgage.
I like what I read about IF, and the recommended protocol for women is 16 hours or so off, so I figure I'm doing that a couple of days per week (7:30 pm - 11 am is 15.5 hours). It seems to work for me, but ymmv.