2/3 c. sugar (may decrease to 1/2 c.)
1 tsp. dry mustard
1 tsp. salt
1/2 tsp. onion juice or grated onion
5 tbsp. white vinegar
1 c. salad oil
1/2 to 1 tbsp. celery seed or poppy seed
1 1/2 tbsp. lemon juice

Combine sugar, mustard, salt, onion juice and 2 tablespoons of the vinegar. Mix with electric mixer on medium speed until well mixed. Start adding oil very slowly; beating constantly. This will be very thick. Add remaining vinegar and lemon juice. continue beating until thick. Add choice of celery or poppy seed. Store in refrigerator. Make several hours ahead of serving time. Keeps well. You may mix in blender but be careful not to overbeat or it will separate.