This recipe makes approximately 500ml sauce. It should be enough for 4 people with each getting ½ cup of sauce. However, for pasta dishes, you may need more sauce per person.
Make roux paste by combining 2 tbsp butter and 2 tbsp flour. Mix well until you form a paste You can also use pork fat or vegetable oil to replace the butter. Alternatively, you can make a corn starch slurry to thicken the sauce but the sauce won’t look as glossy
On medium heat, add 2 tbsp oil and sauté the chopped shallots and garlic until aromatic
Add 500 ml water and bring sauce to a boil. Put the heat on high. Add tomatoes and let the sauce boil again
Reduce heat to low. Add the roux paste and stir until sauce thickens and cook for another 5 minutes to make sure that the flour is fully cooked
Taste test and add 1 tsp salt if necessary. Add water if you want to thin it and more roux paste if you want it thicker. Add white vinegar to make it tangier