Whisk egg yolks, yogurt and mustard powder together until smooth
Add grated cheese, salt and pepper
Mix together and set aside
Toast fresh bread lightly on both sides. I used home baked bread that I made this morning
Spread a light layer of homemade chilli jam on each slice (see my guide for chilli jam)
Cover each slice of bread with a quarter of the cheese mix
Cook under a pre heated hot grill until it starts to bubble
Make a criss cross on the rarebit and splash with Worcestershire sauce. Enjoy!!