I am almost two and a half years post sleeve. At your stage I was eating around 800 calories I think, but if I've learned anything it's that we're all totally different!
Well into maintenance, my typical day is:
Breakfast: full cream milk latte. I have never eaten breakfast at breakfast time and never will.
Mid morning: one or two fried or scrambled eggs, depending on how hungry I am. Generally one.
Lunch: a salad with some protein (last night's dinner meat, tinned tuna or deli meat - sometimes cheese). Or more often soup - usually homemade and usually with either chicken or pulses for protein. Or occasionally, if I'm feeling really lazy and can take the sugar hit, 100g tinned baked beans with cheese and hot sauce.
Snacks, probably three a day at this point: cheese (and usually a couple of crackers with that); 150mls [approx] full cream milk kefir or a kefir yoghurt; nuts (30g approx); seeds (20g probably); deli meat; fruit (I eat at least one portion of berries or an apple every day). I tend to keep lots of meat snacks in the fridge as they're filling and help me reach my protein goal.
Dinner: whatever I've cooked for everyone else but without the carb element, or just a tiny bit. Basically protein and veg - in that order. But that includes fried chicken, bolognese, casseroles, sausages, roast dinners, fish pie (no potato topping) - everything I used to eat before my sleeve.
Supper: I do most of my carb intake here. Toast and butter, porridge (oatmeal to you lot) with stewed fruit, crackers with butter (or cheese if I haven't cheesed out by then).
Exercise: I do a 1 hour aerobic exercise class 3 days a week. I walk between 2 and 4 miles every day and I jog about a mile once or twice a week instead of walking. I am still amazed by what my new body can do. I probably should do more.
This is my diet 90% of the time. I have lots of days when I stray badly off the path and eat chips (crisps) and occasionally chocolate. I also drink wine every weekend, which I accept is totally empty calories with no nutritional value. I just track everything and try to adjust if I can. I've had a couple of regains of a few pounds now (4ish), but so far I've been able to jump on those, ditch the rubbish (carbs mainly), up my exercise and get back to 140 or thereabouts. It's no problem at all - a couple of weeks of being more vigilant about what goes into my mouth and a few runs instead of walks. I really hope I can keep doing that. I may have to accept that my set weight is higher than 140 but I am loving it here!