This is a great and easy recipe from recipetips.com .
1 green pepper
4 tomatoes skinned
2 garlic cloves
1 teaspoon salt
In a blender, add the green peppers strips and onion. Process until liquefied.
( I put them all together and added salsa, cumin, chili powder and Cayenne pepper to make this a enchilada sauce)
Add the tomatoes, garlic and salt. Puree until liquefied
In a large saucepan, add vegetable mixture. Bring to a boil for a few minutes, and then allow it to simmer. As it the tomato sauce simmers, the excess water will rise to the top. Go ahead and take a spoon and skim off the excess water. ( I found this unnecessary since water usually boils out)
Simmer until it reaches your desired consistency. Remove from heat and allow to cool.