Place the tomatoes in boiling water for 12 -15 seconds. Just enough to have the tomato skins crack. Then remove the tomatoes from the liquid and remove their skins. Roughly chop the tomatoes. Put all of the ingredients including the garlic and olive oil into a pan and simmer for 50 -60 minutes or until the peppers and onions are soft. If the sauce is to thin for you, cook longer, if it''s to thick add a little more vegetable stock. Add the crystal hot sauce if you like to brighten up the flavor. Add the tomato paste if you prefer a little more tomato flavor This should not be a firey hot sauce, just enough heat to let you know that it''s a mexican sauce.