Chocolate orange ganache tart and all's well that ends well

I started writing this post with EBTG’s “When all’s well” playing in my mind; I explain: this tart is a result of some stressful moments, but it all worked out fine in the end.

The initial idea was baking this tart to finish up the marmalade jar I’d bought for Nigel Slater’s cake. I’d already thawed some really good pastry I had in the freezer and lined the tart pan with it; after that, I made