Bistro quality burger

A burger topped with caramelized onion and blue cheese spread. Yum...

For the caramelized onions:

4 large onions, sliced

2 tbsp butter

1 tbsp olive oil

Salt

For the burger patties:

3 lb ground chuck

1 lb ground sirloin

Garlic salt

Pepper

Onion powder

Smoked paprika

Cumin

Chili powder

Dried parsley

Cayenne pepper

For the blue cheese sauce:

1/4 c mayo

1/4 c fat free sour cream

1 garlic clove, minced

1 tbsp lemon juice

2 tbsp chopped chives

.3 lb crumbled blue cheese

Salt and pepper to your liking 

For the burgers:

12 Kaiser Buns

Arugula for topping

To caramelize onions:

Heat butter and olive oil in a Dutch oven over medium heat. Add the onions and generous pinch of salt. Occasionally stir and cook for about an hour until the onions are caramelized. 

To prepare the burger:

Mix both ground meat together and portion out the meat to 1/3 lb each. You should get 12 patties after portioning them out. Shape them into parties. Next season the parties with the garlic salt and next 7 spices. Grill the burger patties to your liking. 

To prepare the blue cheese sauce:

Mix all the blue cheese sauce ingredients together in a small bowl. Chill in the fridge until ready to serve. 

To serve:

Toast the buns with a little olive oil, salt and pepper. Place one cooked burger patty on a bun, top with caramelized onions, arugula, and the blue cheese sauce.