Possible Clues:

• Mix thoroughly, as oil and vinegar
• Disperse oil in water
• Combine (two liquids) into a smooth mixture
• Combine liquids into a smooth mixture
• *Mix, like oil and vinegar
• File my US novel and convert a number of elements into something saucy
• Thoroughly mix (two fluids such as oil and water)
• Coalesce
• Bird that can't fly — hence fly is to make milk?
• Eastern slum comes up, for your information, strangely with way to make vinaigrette