Method:

1. Heat the oil in a frying pan over a medium heat. Fry the burgers for 10-15 minutes, turning frequently.

2. Wipe the mushrooms clean and remove the stalks.  Place in the frying pan and season with salt and pepper and add a knob of butter to each. Fry for 4-5 minutes turning occasionally.  Set aside.

3. Fry the streaky bacon until crispy.  Set aside.

4. When the burgers are cooked you can start to assemble:

• Place lettuce onto the bottom of the buns, and top with a burger and a slice of Mexicana.
• Next, load on tomato and onion slices.
• Top this with another burger and Mexicana slice, more onions and tomato.
• Finish with the fried mushroom and a dollop of guacamole or ketchup and finally the bun top.

5. Sit back and indulge!