Spray a medium frying pan with low-calorie cooking spray and place over a medium heat.
Add the beef mince, paprika, cumin, oregano, garlic granules, onion powder and Henderson's relish. Fry for 8-10 minutes until the juices have evaporated and the beef is cooked through. Season to taste with salt and pepper.
While the mince is cooking, spray another frying pan, add the onion and bacon and fry for 4-6 minutes until onion is soft and bacon cooked and crispy.
On your serving plates or bowls, layer up the lettuce, cucumber, tomatoes, sweetcorn and gherkins. To a small bowl add the mayonnaise, ketchup, gherkin pickle vinegar, mustard powder, garlic granules and sweetener and mix until smooth. Season to taste with salt and pepper.
Top the lettuce with the cooked beef mince, onion and bacon. Sprinkle over the cheese and finish with a drizzle of burger sauce dressing.