Fried golden potatoes with onions

Ingredients:

• 0.7 kg (about 3 tubers) round white potatoes
• 1 large sweet onion
• Coarse salt
• 1 tbsp. vegetable oil
• 2 tablespoons butter

Preparation:

1. Heat a 25cm heavy-bottomed frying pan over medium heat.
2. Slice the potatoes and onions very thinly. Season the vegetables with salt. Add the vegetable oil and butter to the pan. Once the oil foams, add the potatoes and onions.
3. Place a plate on top of the potatoes and weigh it down with any weight: a bag of flour, heavy canned goods, etc. Fry for 2-3 minutes until the potatoes are crispy on the bottom, then flip, add another weight, and fry until crispy. Continue turning the potatoes and onions for about 20 minutes, until they are evenly golden and crispy on the bottom.