This was printed on a promo recipe card by French’s and found in a large collection, date unknown. I’ve typed it below along with a scanned copy.

SPINACH SALAD WITH CREAMY DRESSING

1 teaspoon Colman’s (dry) Mustard
1 teaspoon water
1/2 cup oil
1/2 cup half and half or light cream
1/4 cup white wine vinegar
1 teaspoon French’s Salad Seasoning
1/2 teaspoon sugar
1/4 teaspoon salt
Fresh spinach leaves

Combine mustard and water; let stand 10 minutes to develop flavor. Add oil, half and half, vinegar, salad seasoning, sugar, and salt. Blend or beat until well mixed. Pour over spinach leaves and toss lightly. Makes 1 1/4 cups dressing.