Potato tart with caramelised onion topping – Food & Home Magazine

Ingredients

• ***DOUGH
• 120 g soft butter
• 250 g potatoes, boiled, mashed and cooled
• 240 g (2 cups) cake flour
• 1 egg yolk, lightly beaten
• 3 ml salt
• 10 ml (2 tsp) baking powder
• ***TOPPING
• 60 g butter
• 3 onions, thinly sliced
• 60 g soft brown sugar
• olive oil, to drizzle
• 150 g mozzarella, sliced
• 1 large potato, very thinly sliced
• fresh thyme, stalks discarded
• salt and freshly ground black pepper, to taste