Potato, onion and tomato gratin

Layers of thinly sliced potato, soft onion and tomato baked in stock with oregano, with a crisp crumb topping.

Serves6
Prep10 minutes
Cook1.5 hours
Oven170°C fan
SourceRachel Roddy
  • potatoes
  • tomatoes
  • gratin

Ingredients

6
Serves 6

Method

  1. Heat the oven to 170°C fan. In a frying pan on a medium low heat, melt a knob of and two tablespoons of , and saute the with a pinch of until soft and translucent.
  2. Peel and slice the thinly in the Magimix. Slice the .
  3. or an ovenproof dish.
  4. Use a third of the to make a base layer, spread over half the and half the , then season with , and .
  5. Repeat, finishing with a layer of potatoes. Dot with butter and pour over the .
  6. Bake for 1.5 hours, or until the are soft and the liquid absorbed.
  7. Mix a handful of with a pinch each of and , and a tablespoon of .
  8. Sprinkle over the bake and put under the grill for a few minutes to crisp up.