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potato bake gratin scallop potatoes recipe

Potato gratin / Scalloped Potatoes recipe

Posted on December 6, 2025December 7, 2025 by Simple Essentials

Regardless if you call this dish Potato bake, Potato Gratin, Scalloped Potatoes or Potatoes Au Gratin, this recipe is easy to make and very comforting.

Potato gratin ingredients:

Makes 6 serves

  • 1 tbsp olive oil or butter
  • 1 small leek or medium brown onion
  • 1-2 cloves minced garlic (or 1 tsp garlic powder)
  • 6-8 medium potatoes
  • 300 ml thickened cream (or make a white roux/sauce with butter, flour and milk)
  • 1-2 tsp wholegrain mustard (dijon also works)
  • 1 tsp dill
  • Salt and pepper
  • Optional extra: 1 cup cheese (I typically use tasty or cheddar)

Cooking instructions:

  1. Bring 1 large pot of water to a boil with a pinch of salt.
  2. Wash potatoes and add to the pot (you can peel potatoes if you prefer, but you don’t have to. I typically cut potatoes in half to reduce cook time).
  3. Boil until almost done (fork tender, but not crumbling or falling apart).
  4. Drain potatoes and pop on your cutting board.
  5. Preheat oven to 200C (180 fan forced) and prepare an oven dish (approx 30 x 20 cm) with some non stick spray/oil.
  6. Use a fork and a sharp knife to cut potato into fairly thin slices. Layer potato in the oven dish.
  7. Slice onion/leek in thin slices.
  8. Add butter/oil to a fry pan and cook onion/leek on medium heat until soft and translucent.
  9. Stir together cream (or roux), mustard, salt, pepper, dill and onion/leek.
  10. Pour over the potatoes and spread evenly.
  11. Optional extra: add 1 cup of cheese on top
  12. Bake in oven for about 20 minutes until potatoes are bubbly and cheese has browned slightly.

Enjoy with your favourite protein.

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