Burgers - Cooking like a Boss

Burgers. Easy ones. With Stilton in the middle. Recipe makes 4 very respectably sized burgii.

900g 0.9kg 1.98lb 31.7oz minced beef		mash together in a bowl	divide into 2N flattened patties for N people	sandwich	medium grill for 10 minutes flipping half way
2 onion	finely chopped
2 celery stick	finely diced
2 tsp 0.01 l 10 ml ²⁄₃ tbsp 0.042 cup 0.018 pint mixed herbs
2 tsp 0.01 l 10 ml ²⁄₃ tbsp 0.042 cup 0.018 pint English mustard
salt
pepper
100g 0.1kg 0.22lb 3.53oz blue Stilton	crumbled