I make a mince based bake with lots of different veg in. Sometimes add cooked rice, sometimes potatoes. You can use whatever you like.
Cut up lots of vegetables, I tend to use peppers, courgettes, fennel and then whatever else is available, currently leeks, aubergine, thinly sliced carrots. Put them all into a large, shallow oven proof dish and mix them up, then add rice if you use it and mix that in, followed by broken up mince, any kind, or Quorn/TVP. Mix it all thoroughly and spread it out, add some salt and pepper and cover the top with sliced tomatoes, black pepper, olive oil over the top and put it in the oven until it is cooked. It is popular here and you can also add spices or herbs if you like.
Another one involves cheeses and ham or fake bacon/ham - same method, chop up aubergines, courgettes, tomatoes, peppers, various colours, and whatever else you fancy, onions or leeks, cut up ham and put it in. Add a large squirt of tomato paste and stir it in, then add chunks of cheese, mozarella, camembert and one other, or whatever you like, mix it all up with s&p, put some white sauce on top if you have it, just a few tablespoons and spread it over, then some grated cheddar, or sliced if you prefer, and bake it.
Or a frittata with lots of veg. I tend to make everything in the oven, and serve with saute potatoes or wedges.