Prepare the parmesan fries

• Cut the potatoes into fries and pat them dry.
• Toss with olive oil, salt and pepper, then spread on a baking tray.
• Bake at 220 °C until golden and crisp.

Cook the smashed patties

• Heat the frying pan until very hot.
• Place the beef balls in the pan and smash them flat with a spatula.
• Season and cook until a crust forms, then flip.

Melt the cheese and toast the buns

• Top each patty with cheddar and let it melt.
• Toast the buns in the pan with butter.

Finish the fries and assemble

• Toss the hot fries with grated parmesan.
• Build the burgers with the patties and buns and serve with the fries.