• Put everything into a large container. This recipe is too large for my emulsion blender's container, so I use a large mason jar. If you don't have an emulsion blender, you can mix this in a blender.
• Put emulsion blender all the way into container so that bottom of blender is resting on the bottom of the container. Turn on and blend for 30-60 seconds, moving blender up and down until fully blended.
• Put ketchup in a glass container and put a lid on it. If using whey, let it sit on the counter for 3 days, then place in refrigerator. If not using whey, put ketchup directly into refrigerator.

How to Make Whey

• Line a colander with several layers of cheesecloth or a piece of muslin. Place colander over bowl to contain whey. Take a small container of plain yogurt (cannot be flavored or sweetened) and put it into the colander. Cover and let sit for 2-3 hours. Return yogurt to container and use as you would Greek yogurt. Place whey in jar with lid and keep in refrigerator.