Tried a new secret ingredient, and it impacted like a culinaric tactical warhead: sweet chili sauce between the tomatoes and lower salad. Additional to the P&W Burger dressing spreaded on the buns.
Construction manual

, layers form top to bottom:
a few drops of roasted sesam oil
burger bun
P&W Burger Dressing
salad of any kind
2 strips of bacon
onion rings
1 slice of melting cheese
beef (very little salt and pepper)
1 slice of melting cheese
3 slices of tomatoes
Heinz Sweet Chili Sauce
salad
P&W Burger Dressing
burger bun
All packed into a paper towel. Grab it tight with both hands and dont let it go, and if it gives you troubles and tries to escape - bite it!
The disadvantage of something so tasty is that it disappears the faster the better it tastes. And no, its not healthy. But its fun.