Veggie burgers are fun, and you can put all kinds of things in them. It's a great way to use up leftovers, and to repurpose peppers that are getting a little too soft to be good in a salad. We add wheat germ and flaxseed meal to ours.
Lentils are really versatile, and so are beans. Do you have a crock pot? Soups and chilis are great and so easy. You don't even need an exact recipe. A taco bar works like a salad bar - people just pile on the things they want and maybe they'll try something new. Again, quantities don't matter. Enchiladas are really easy - we use the burrito size and pile on beans and veggies and cheese, the fold and secure with a toothpick. We pour sauce on top and add more cheese.
Try stir fry veggies - we love them over rice. We stir the long-cooking ones (broccoli, carrots) while someone chops the next round (peppers, onions) and when those are added someone chops the last round (zucchini, celery). I use the firm, cubed tofu which I fry up first in healthy oil, then set aside while the veggies stir fry, and mix it all at the end with an easy sauce. We toss in some water chestnuts for crunch, and nuts like peanuts or cashews. We throw on a handful of sprouts just at serving time. If you make the rice with 5-spice powder or ginger added to the water, it gets a nice flavor.
I'm not sure which ingredients you don't eat, but maybe you can expand your palates a bit or you can do any of the recipes above without the thing you all dislike. The recipes are fine either way.
Lasagna rollups are easy - lasagna noodles with a ricotta/cottage cheese mix or some tofu ground up in it (which you will not taste). Roll up pinwheel style and put in a casserole with sauce on top, plus some mozzarella or Parmesan. You can make on the weekends and reheat on Monday or Tuesday. They're easy to take in a thermos for lunch too. You can grate up zucchini and peppers into any Italian sauce, and you can throw in a handful of frozen spinach which will defrost quickly as the sauce heats. It's an easy way to put veggies you don't like into other forms. Try it!
Egg/vegetable casseroles are easy too, and they reheat well for breakfast the next day. You can do them with potatoes (hash browns or oven fries) as the base "crust" and then add typical omelet veggies you like, and top with eggs/cheese. Bake at 350 for 45-50 minutes and cut like a lasagna.
Go to the library and get a few good vegetarian cookbooks with 5 ingredients or less, and look for some with appealing photographs. You'll be surprised at how easy things can be. I often have a 5-ingredient limit (not counting salt & pepper) and that's how I taught my son to cook.
For lunch, do hummus spread on flat bread/wraps with some sliced up veggies (thin carrots and cukes, some lettuce or spinach leaves).