Grilled Mustard Frankfurters

This recipe comes from a little newsprint pamphlet from McCall's Magazine copyright 1956. The title is McCall's 30 Recipes For Grill and Rotisserie Outdoors and In. There are two frankfurter recipes in the pamphlet. This one features a mustard sauce made with dry mustard.

Grilled Mustard Frankfurters

1 egg

1 tablespoon sugar

1/4 teaspoon salt

3 tablespoons dry mustard

1/2 cup vinegar

1 tablespoon olive or salad oil

1 pound frankfurters

Make the sauce like this: Beat egg with a fork until frothy, then mix in the sugar, salt, mustard and vinegar smoothly. Cook over boiling water, stirring constantly, until sauce is as thick and smooth as heavy cream. Now mix in oil and keep hot until frankfurters are broiled.
Split frankfurters in half lengthwise, arrange on broiling rack and broil until meat begins to sizzle. Transfer to a platter and pour the hot sauce over. Serves 4.