Right...last night I spotted the most amazing cake in the shops (half pears in almond and belgian chocolate tart). Anyway, thought it was more a tart in the ganache sense but it's kind of fluffy spongey looking in a tart you need to cook sense.

The instructions say cook it. I want to cook it. I WANT HOT TART.

My oven's broken and I don't have a microwave. Any ingenious ways to heat this beauty up? It's got a pastry case if that helps so no stupid suggestions to steam it.