Hi there...we're not a vegetarian family but only eat meat twice a week.
We have vegetarian "bolognaise" and vegetarian curry,...the bologniase we make with red lentils.
We just fry onions, add two cloves of garlic....gently cook for a few mins, then add diced carrots, red lentils which have been soaked, some olives, tomato sauce (we make our own) mix of herbs....salt and pepper and a bit of Worcestershire sauce. You can add celery with the carrots if you like...or any veg really.
Veg curry is just easy....any veg you like cooked with onions and garlic and some curry powder....add some coconut cream or milk....maybe half a tin of chopped tomatoes.
Other veg meals include stir fried veg with egg fried rice, falafels (you can buy mixes for this in a sachet)
Veg soup with bread. Or if I am busy I just roast a big load of veg....with garlic and rosemary. Potatoes, sweet potatoes, onions, peppers, carrots....anything you like. We eat that on it's own but you might like gravy.