Step 1

Peel a medium-sized onion and cut it into quarters so it easily fits in the blender.

Step 2

Measure all of the ingredients and put them into a blender.

Step 3

Turn the blender to high and blend for 30 seconds. Scrape the edges and blend for another few seconds.

Step 4

Stir in poppy seeds if desired (don't blend them with the rest of the ingredients.) Use immediately on salads or store in the fridge for later use.