Ingredients

  • vegetable oil for frying
  • 2 pounds russet potatoes peeled and cut into sticks
  • 1 1/4 pounds ground beef
  • 1 onion finely diced
  • 1 egg
  • 4 slices mozzarella cheese
  • 4 hamburger buns split
  • 4 tablespoons pesto ready-made
  • tomato slices
  • lettuce
  • basil leaves for garnish

Method

  • Heat 1 1/2 inches oil to 325°F in a large heavy pot over medium heat. Add the potatoes in batches and fry for 4-5 mins per batch until cooked but not colored. Drain on paper towels. Reserve the oil.
  • Mix together the beef, onion and egg and season with salt and pepper. Shape the mixture into 4 large patties. Heat a little more oil in a large skillet over medium-high heat, add the patties and cook for 4-5 mins per side for medium. Top with the mozzarella; cover and cook for 1 min until the cheese has melted.
  • Meanwhile, heat the oil to 350°F. Refry the potatoes in batches for 4-5 mins per batch until golden and crisp. Drain on clean paper towels.
  • Brush the bottom halves of the buns with a little pesto. Top each with some lettuce and tomato, then a burger and more pesto. Sandwich with the bun tops, garnish with the basil and serve with the French fries.