Chorizo Burger

Step 1
Start the burgers: Mix ground sirloin and chorizo together with your hands in a large bowl until well combined. Set aside to let the flavors blend while you cook the onions and make the sauce.

Step 2
Cook the onions: Heat oil in a large skillet over medium heat. Add onions, brown sugar, salt, and pepper; cook and stir until onions are golden brown, about 15 minutes.

Step 3
At the same time, make the sauce: Heat oil in a skillet over medium-high heat. Add onion and saut? until tender. Transfer onion to a blender. Add ranch dressing, red pepper, paprika, and saffron; pulse until fairly smooth. Refrigerate until needed.

Step 4
Finish the burgers: Preheat an outdoor grill for high heat and lightly oil the grate. Form meat mixture into four patties, slightly larger than the buns.

Step 5
Cook burgers on the preheated grill until well done, about 5 minutes per side. Split buns in half and spread butter on the insides. Toast briefly on the grill.

Step 6
Place burgers onto buns and top with caramelized onions, ranch sauce, and Manchego cheese.