Mustard mayonnaise
This is exceptionally good with seafood
Meme
1 teaspoon cornflour     Mix well Refrigerate covered
1 teaspoon dry mustard  
1 teaspoon French mustard  
salt and pepper  
15g butter  
1 tablespoon sugar  
2 egg yolks  
1/2 cup milk     cook gently until thickens
2 tablespoons vinegar  
1/2 cup cream beat softly   mix in
Makes 1 1/2 cups