Mini tart filling ideas

[Lorelai]

I am making some mini tarts for a buffet on Sunday; was originally going to do mini quiches but now someone else is, so I need some inspiration. They will basically be shortcrust pastry with different fillings. So far I have thought of Brie & cranberry and mushroom (but not sure how to prepare the mushroom). Any other ideas?

I am vegetarian so would ideally like veggie fillings, and in the house I have a red pepper, courgette, butternut squash, onions (inc 1 red one), sweet potatoes, and lots of cheese, but I can go shopping.

leek and goats cheese

sundried tomato, feta and thyme

A really good one, is slow cooked caramelised onions, mushrooms fried with olive oil and a knob of butter, once cooked add a couple of splashes of balsamic vinegar, reduce and then add a few glugs of double cream and some torn up basil - I'm doing it tomorrow, you can serve it warm with salad or cold for a buffet - very yummy!