Mum's Salad Dressing

This yummy homestyle dressing is a favourite of mine that my mum always made for us. It will keep for 6 weeks in the fridge.

PREPARATION:

2 eggs
2 tablespoons sugar or equivalent sweetener
1 teaspoon salt
1/2 teaspoon mustard powder
sprinkle pepper
6 tablespoons vinegar
4 tablespoons water
small piece butter (size of a walnut)

Beat eggs, sugar/and or sweetener in a small basin. Add the salt, mustard and pepper. Then add the water and vinegar and beat together.
Add the butter and put the basin over a saucepan of boiling water until the mixture thickens. Do not allow mixture to boil.