Caramelized Onion Tart with garlic

2 tablespoons olive oil plus extra for brushing phyllo sheets 2 cloves garlic freshly minced 3 each red onions halved and thinly sliced 1 each yellow onion[...]

50 g butter 1 tablespoon olive oil 4 large yellow onions , sliced 1 garlic clove , crushed 2 eggs 2 egg yolks 50 g coarse grain mustard 142 ml double cream[...]

2 cups all-purpose flour 1/4 cup cold butter 1/3 cup shortening 1/3 cup cold water 1 pinch salt 1 lb yukon gold potato 1 lb sweet potato 3/4 lb parsnip 3[...]