Big Mac Style Wraps

Name: Big Mac Style Wraps
Prep time: 30 min
Cook time: 40 min
Total time: 40 min
Yield: 4 portions
Ingredients: 100 g mayonnaise; ½ tsp dried onion flakes; 1 ½ Tbsp ketchup; 25 g pickled gherkins; 1 tsp pickled gherkin liquid; ¼ tsp ground black pepper; ¼ tsp fine sea salt; 4 cheese slices; 15 g olive oil; 50 g red onion; 400 g beef mince; 4 wheat flour tortilla; iceberg lettuce; red onion