Jane's Whole Egg Mayonnaise

1 whole egg
1/2 teaspoon prepared mustard
1/2 teaspoon salt
1/8 teaspoon white pepper
1 cup oil
1 to 2 tablespoons lemon juice or vinegar

Have all ingredients at room temperature.

Put egg, mustard, salt, and pepper in blender and run at low speed for 30 seconds. As blender runs, add oil in thin stream, increasing blender as mayonnaise thickens. Add lemon juice or vinegar.

Refrigerate.

Makes 1 1/4 cup