Cheese Stuffed Burger

Burger is humble meal but that does not prevent it from being the fancy one. It is loved by old and young.
Here is my take on a stuffed burger with balsamic onions and sauteed mushroom toppings. They are juicy delicious. Two pounds of beef yield you 12 burgers which makes it extremely budget friendly meal.

Ingredients

Beef/Lamb mince            2 lbs
Onion                              1
Green chili                        1
Salt                                  1 1/4 tsp or to taste
Black pepper                   1/2 tsp
Worcestershire sauce       1/2 tsp
Mozerrala cubes              12 1*1 cm cubes
Oil                                   4-6 tbsp for frying

Toppings

Onions                            2 sliced
Oil                                   2 tbs
Salt                                 1 pinch
Pepper                            1 pinch
Balsamic Vinegar             1 tbsp

Mushroom                       4 oz
Butter                              1 tbsp
Olive Oil                          1 tbsp
Salt                                  1/4 tsp
Pepper                             1/4 tsp

Tomatoes                         2 sliced
Lettuce                            12 leaves
Mayonnaise                     12 tsp
Hot Sauce                       3-4 dashes
Kaiser Buns                     12

Method

1. Grate the onion and chop green chili really well. 
2. Add salt, pepper, worcestershire sauce and mince.
3. Mix with gentle hands till everything is incorporated.
4. Divide into 12 portions.
5. Make a flat disc in the palm of your hand and place in the cheese cubes.
6. Bring the edges together to close around the cheese. Flatten the disc to get a 4-5 inch patty.
7. For the toppings, slice the onions 1/4 inch thick.
8. Add oil to the frying pan and heat on medium low heat.
9. Add the sliced onions and sprinkle salt and pepper. You don't want to brown the onion so keep the heat low.
10. Once onions has soften a bit, sprinkle the balsamic vinegar on top. Mix and take off the heat.
11. For the mushroom, Thickly slice hem.
12. Heat the olive oil and butter in a pan on medium high. Put the mushroom in a single layer. Once the edges seems to get brown, flip them over and sprinkle salt and black pepper. Brown the other side and take out of the pan. Keep repeating until all mushrooms are done.
13. Mix hot sauce and mayonnaise together.
14. Heat a couple of spoons of oil in a pan and fry the burger patties on medium high. Once the bottom is brown, flip them over and cook on the other side.
15. Toast the buns and apply mayonnaise generously on both sides.
16. Put the lettuce followed by tomato, beef patty, onion and mushroom.