(We are a very omnivore family - but we are trying to be less meat eating and eat more veg generally, and more fish generally, including trying to actually have vegetarian meals (actually veggie not pescatarian) at least once a week again (I have a big salad with just veg about 3/4 days for lunches - I'm talking about dinners).
I like, when DH is away, to make a mushroom stew thing - slowly fried mixed mushrooms with garlic and thyme, some white wine and cream, served over crunchy sourdough toast or as a sauce on pasta. DH thought it was a revelation when he had it recently, but tends to want some bacon or chicken on pasta as well.
I also do an M&S Welsh Rarebit which I bake with some part-baked rolls for crunchy bread to eat it - again something I tend to have as an option when DH is away, although DD has now copped it and wants it too. Which he also quite fancied when he had it one night.
Then again, I have been known to do myself a nice slab of steak and some roast potatoes and roasted vine tomatoes when he's away too....sometimes you just fancy it!
One recent child-free day, when not a lot of places were open, DH and I tried a vegan coffee shop/restaurant. We were fine with the options to eat, both found nice things. I think though I realized I couldn't do vegan when, not only was my quiche made without eggs or cheese, (very tasty but unusual), but I was offered a choice of "rice milk, soya milk or coconut milk" in my latte - soya milk works ok, and I would drink it again if that was the only option but I think I am a bit too wedded to the cow for my everyday coffee! 