Source: Taste of Home Cooking (originally from Oishii)
1 1/2 lbs. ground beef
2 Tbs soy sauce
5 Tbs Sriracha, divided**
2 tsp. freshly ground black pepper
4 slices thick cut bacon
1 large sweet onion
3/4 cup blue cheese dressing
4 brioche buns
4 thick slices Swiss cheese
1 tomato, sliced
several handfuls of arugula
In a large mixing bowl, combine the ground beef, soy sauce, 2 1/2 TBS. of the Sriracha, and the pepper. Be careful not to over mix. Form the mixture into 4 patties, and set aside, on a parchment-lined plate, covered, in the refrigerator.
Preheat a charcoal or gas grill to medium high heat. In a medium frying pan over medium-low heat, cook the bacon, turning as necessary. While the bacon is cooking, peel and quarter the onions. Cut each section into 1/4-inch slices. Once the bacon is cooked through and slightly crispy, remove the slices from the pan, cut each in half crosswise, and drain onto paper towels, reserving the remaining bacon fat in the pan. Cook the sliced onions in the bacon fat over medium-low heat until they caramelize, 20 to 25 minutes.
Grill the burgers, to your desired doneness.
While the burgers are cooking, combine the blue cheese dressing with the remaining 2 1/2 Tbs Sriracha*** in a small bowl.
Lightly toast the buns on the grill during the last minute of cooking time. Spread the blue cheese mixture on both halves of each hamburger bun. Stack a burger patty, slice of Swiss cheese, bacon, caramelized onions, slice of tomato, and a small handful of arugula between each hamburger bun.
***Be careful!! Add this in a teaspoon at a time, and taste as you go to get it to your desired taste.