What's probably missing from your meatless meals is fat, and also, you need a lot more food in a meatless meal to feel full.
Two of our favorite meatless meals are hummus and pita, and curried potatoes. Hummus and pita sounds kind of deceptive, what the meal really means is a giant bowl of homemade hummus (2 cups dried chickpeas worth, ends up as oh... maybe 4-6 cups of hummus? for dinner and lunch two people. I'd guess that we each eat the equivalent of at least a package and a half of hummus from the store), homemade pita breads, a half pound of feta cheese, a bowl (maybe 3/4 of a cup) of salted yogurt, sometimes with herbs to make tzatziki, sometimes plain to be frugal, and oasis salad (made of a full onion, 4-5 small radishes, a carrot, and sometimes a half cucumber, which is salted to taste, and with a bunch of distilled vinegar over it, and pickled for 30 minutes or more). It's a lot of food, and a lot more than we would eat in a meat meal. (mind you, we are both early twenties with large appetites and fast metabolisms, I easily eat 3,000 calories a day to maintain body weight with minimal exercise and I would guess DP is similar or higher, so you might eat less. We do also have enough hummus and pitas leftover for lunch.)
Curried potatoes is a skillet full of red potatoes in coconut milk Indian curry sauce, served with about 1-1.5 cups (raw) rice, and a yogurt sauce, which varies on DP's mood, usually either plain salted, or raita.
Honestly, if you want to eat less meat, rather than having a bunch of meatless meals, I would recommend meals with less meat. Such as stir fried meat with veggies over rice, or we're a big fan of a little chicken (maybe a chicken leg and thigh or breast for the two of us) cut up small and mixed in the sauce with pasta (not so much a straight marinara, but more like a veggie sauce, where we saute up veggies (whatever seasonal, we ate it with summer squash last year so much), some onions always, and garlic, sometimes tomatoes, and spices. Curries are great for stretching meat, and we love a big hearty stew with lots of veg and a little meat. Because the whole stew gets meaty and rich, it doesn't matter if there are only a couple small pieces of meat in your bowl. (it helps to throw a bone or two into the pot)