https://www.littledairyontheprairie.com/simple-french-dressing With processor running, slowly add oil to dressing ingredients. Whiz until dressing emulsifies. Add the mustard paste and blend the dressing until the oil and powders are completely emulsified and combined. To make dressing: To a food processor or blender add all dressing ingredients except oil. To make salad: Place greens in a large salad bowl. Store in refrigerator until needed. Whiz together. In a large measuring cup combine the remaining ingredients and mix well. https://www.allrecipes.com/recipe/228548/ruby-french-dressing Thinly slice onion and separate into rings, add to bowl. Mix dry mustard and water into a paste and let stand 10 minutes.