Potato, onion, sage and gruyère tart Recipe

Potato, onion, sage and gruyère tart Recipe

  • 4 tbsp olive oil
  • 6 sage leaves
  • 3 onions, peeled and finely sliced
  • 250g/9oz ready-rolled all-butter puff pastry
  • 3 large cooked leftover roast potatoes (or boiled potatoes), quartered
  • 150g/5½oz gruyère
  1. Preheat the oven to 190C/170C Fan/Gas 5.
  2. Put the olive oil and sage leaves in a pan. Fry until crisp and then immediately remove the sage leaves and set aside.
  3. Add the sliced onions to the same pan. Cook over a low to moderate heat for 20-30 minutes, stirring occasionally, until soft and caramelised. Set aside.
  4. Lay the puff pastry out on a lined baking tray and top with the caramelised onions, leaving a border all around. Top with the potatoes and grated gruyère. Bake for 20-25 minutes.
  5. Remove from the oven when golden-brown, garnish with the crisp sage leaves and serve.
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