I eat about the same amount but more variety perhaps. I'm not a vegetarian but eat mostly vegetarian food, with a good amount of fish. I also feel I should be eating more but I don't fit that much food in my poor 36 week body any more! I appreciate with your history of eating disorders there may be some difficulty in "allowing" yourself to eat as well. Or maybe not, don't want to assume.
I think you could certainly stand to eat more. Perhaps try switching around WHEN you eat (i find I can eat more earlier) and switch the low-fat stuff to full-fat stuff. Nuts and oils and butters are good fats, they are your friend. As are egg yolks. You're eating very clean (which is good!) but some treats won't hurt either.
Breakfasts - I swear by eggs, and keep the yolks, the yolks are really good for you - I have poached or boiled with toast, and some fruit and yoghurt. Peanut butter is good on toast too
Lunches - sandwiches, porridge, jacket potato, big salads of whatever I have in
Dinners - if you're not getting protein from meat/fish probably try and aim for some pulses or nuts or cheese at this point.
I am ravenous first thing so eat big breakfasts, the rest of the day I find it hard to eat, and I've never been much of a snacker. I eat more fruit these days, and sometimes sweet things. Vanilla ice cream and decaf coffee at night is a regular thing :)
Today I had - boiled egg with soldiers, apple, yoghurt / homemade pancakes with ham and mustard and salad, piece of cake / snack - piece of cheese / roasted squash, onion, bacon, lettuce, cheese salad. Then a yoghurt. This was a light day, I am finding it hard to eat enough too.
Are you off work yet, or free in the day at all? I find shopping for fresh food on foot is a nice way to get in some walking and keep my foodie-senses active. I go regularly but don't buy much each time. If you're more short of time wholewheat pasta is a good healthy quick food, have it with some olive oil, cheese, tomatoes, olives, etc. Muesli is good for mornings too, would make a change from porridge, I like it with fruit and yoghurt.
take care, nearly there xx