Tomatoes Tarte Tatin

I love tarte Tatin. Caramelised apples on a buttery pastry. This is not something one messes with and I have always seen the other-than-apple tarte Tatin as a failed way to improve it. I have never been so wrong because the idea is actually to apply this marvelous combination to other ingredients to try to improve them (and not the original tarte).
But then I read this appealing tomatoes tarte Tatin recipe:

PART I

- 400g cherry tomatoes cut in halves and de-seeded (otherwise pastry gets soggy)

- 1 red oignon

Lay out on a baking tray with a drizzle of olive oil, salt and pepper. Bake at 180°C for 20 minutes.

PART II

- 30g butter

- 2 tbsp balsamic vinegar

- 2 tbsp brown sugar

- 2 cloves or garlic

- 2 tbsp thyme

Color for a couple of minutes in the pan then mix with the tomatoes and onion. Lay the pastry above it, tucking in the edges and bake for 20-30 minutes at 200°C.

It was amazing!! I loved the balance between sweetness of the caramelised onions and sharpness of garlic & vinegar.