Preheat the oven to 200°C (390°F).

Peel and slice the potatoes into chips or fries. Toss them in olive oil, salt, pepper, and Chinese five-spice powder.

Spread the chips on a baking tray and bake for 25-30 minutes, turning halfway, until golden and crispy.

While the chips are baking, prepare the burger patties. Season the beef patties with salt and pepper and cook them in a pan over medium heat for 4-5 minutes per side until cooked through.

Slice the bell peppers and onions. In a separate pan, heat a tablespoon of oil and sauté the vegetables for 5-7 minutes until soft and slightly caramelized.

Toast the burger buns lightly in the oven or in the pan, if desired.

Assemble the burgers by placing lettuce, cooked beef patties, ketchup, mayonnaise, and any other toppings you like on the buns.

Serve the burgers with the salt and pepper chips and sautéed vegetables on the side.