In a saucepan add the tablespoon of oil and the onion. When the onion is translucent add the garlic and leave for three minutes. Be careful not to let it burn.
Add the oregano, cumin, chipotle, and salt. Leave for a minute or until the aroma of the spices is released.
Add the tomato puree and water. Mix well and simmer on low for five minutes.
Test and adjust seasoning if necessary.
Using a food processor or a blender, liquefy until completely smooth.
Store in jars in the fridge or freeze.
Notes
This recipe calls for chipotle chile powder, but feel free to use any othe ground chili or chili powder mix that you like.