01 -
Combine beef mince, crumbled blue cheese, breadcrumbs, beaten egg, and finely chopped onion in large bowl.
02 -
Add Worcestershire sauce, Dijon mustard, chopped parsley, salt, pepper and Tabasco to meat mixture.
03 -
Mix ingredients thoroughly but gently with hands until evenly distributed.
04 -
Form mixture into six equal-sized thick patties, being careful not to overwork the meat.
05 -
Cover formed patties with plastic wrap and refrigerate for 30 minutes to firm.
06 -
Heat skillet over medium-high heat and cook pancetta slices until completely crisp, then set aside.
07 -
Cook burgers in same pan over medium heat for 3-4 minutes per side, pressing gently with spatula.
08 -
Combine crumbled blue cheese, sour cream, chives, oil and Worcestershire for sauce. Adjust consistency with sour cream if needed.
09 -
Toast brioche buns, spread with onion chutney, add burger, pancetta and blue cheese sauce before topping.