Bring a large pan with a bit of oil over medium/low heat and cook the chopped onions until translucent. Now add the finely chopped (or blended) tomatoes and garlic and cook this until most of the moisture has evaporated. Now add the remaining ingredients and cover everything with water.

Bring it to a boil turn down the heat and let it simmer with the lid on while stirring every now and then. Depending on how much time you'd like to spend you can let it simmer for half an hour up to how ever long you want to let it simmer.

Once done remove the lid and let the water evaporate until you get a nice sauce consistency. It's up to you on how thick or watery you'd like the dish to be. Enjoy!