Make the chipotle mayo.
Place the mayo, chilies, sauce, cilantro and lime juice into a small food processor and process till well blended.
Pour into a bowl. (Store any leftovers in the fridge for a week)
Place a large fry-pan over medium heat.
Place the ground beef, diced onion, garlic and steak seasoning a bowl and combine well.
Divide the mixture into 4 even sized balls, then flatten well into burger patty shapes.
Add the oil to the frypan and cook the burgers for 3-4 minutes per side or until cooked to your liking.
Prep the fixings while the burgers are cooking - slice tomato and red onion, wash and remove lettuce leaves.
Once burgers are cooked, heat your broiler (grill).
Place a slice of cheese on top of each burger patty and place under the broiler for a minute or 2 to melt.
Place meat patties inside lettuce leaves, add tomato, red onion, dollop over the chipotle mayo and wrap the lettuce around.