I find that smoked cayenne or fresh coriander add a bit of flavour to many veggie dishes.
My husband is a very determined carnivore but is happy to have puy lentils boiled until almost tender then fried with onions, garlic and mushrooms and anything else tasty that you fancy (herbs and spices to taste). Lidl does jars of sundried tomatoes, aubergines, charred peppers and various other vegetables which you can add, they're not expensive - perhaps cheaper than using fresh - and leftovers keep well in the jar in the fridge.
This is lovely with potatoes, some pasta or or rice, and perhaps a nice sausage of some kind.
I also cook fajitas with cumin, fresh coriander, chilli, sliced peppers and onions, beans, served with guacomole, half-fat creme fraiche and some fresh or grilled tomatoes. You help yourself to filling for the wrap. Its easy enough to add a little meat for any carnivores. You can also roll up the wraps beforehand, cover with cheese or sauce and bake in the oven.