Sidewinders® fries with a burger

Ingredients

• 500 grams Agristo Sidewinders® fries
• minced beef
• salt and pepper to taste
• 4 slices cheese
• 4 hamburger buns
• 4 iceberg lettuce leaves
• 1 tomato, sliced
• 1 onion, cut into rings
• 0.5 cup mayonnaise
• 2 tablespoons ketchup
• 1 teaspoon mustard
• 1 teaspoon vinegar
• 1 teaspoon sugar