- 500g Welsh Beef, minced
- 2 tsp English mustard
- 1 clove of garlic, crushed
- 1 egg yolk
- salt and cracked black pepper
- 80g Gorgonzola piccante, crumbled
- 2 tbsp mayonnaise
- 8 mini or 4 large burger buns
- salad leaves, to serve
Balsamic Onions:
- 1 large red onion, sliced
- small knob of butter
- 1 tbsp brown sugar
- 2 tbsp balsamic vinegar