Make sure you got all the ingredients
Preheat a pot (or saucepan if you don't have a pot) on high temperature
Mince the garlic, or substitute with 1 teaspoon of garlic powder
Add 150ml of boiling water to the saucepan, as you cook this sauce, you'll have to add water little by little, since we are not using the oil, the pan should always have enough boiling water, so it does not burn the tomatoes and the rest of the ingredients
and then add the garlic and leave it for about 1 minute
Dice the onion in small pieces
Add the onion to the saucepan and add a little bit of water if it already consumed. Leave this to simmer for about 2 minutes
Meanwhile, dice the tomatoes in pieces of around 2.5 cm (1 inch). Don't get too crazy measuring, but they should be relatively small. Note: I like to use the whole tomato, however! many chefs recommend to remove the seeds because it might make the sauce a bit bitter
Add the tomatoes and then add more water to continue the cooking in simmering
Add only the leaves of the oregano to the saucepan. If you want to include the pepper, add it at this point, as well
At this point, use a turner to move the sauce every minute or so. Once the tomatoes start to become a sauce, you should use a pestle to mash the tomatoes and make them more "sauce like"
Continue this process for another 10 minutes until it looks like this
Add the olive oil once the sauce is done, this will accentuate the flavour in the sauce! that's why I prefer to add it as the last step
Enjoy with your favorite pizza or pasta