Add 1 tablespoon of oil into a medium-sized skillet and heat over medium heat until hot. Add the tomato and a pinch of salt. Chop and stir the tomatoes until the tomato pieces break down, 4 to 5 minutes. Pour in a small splash of water if the pan becomes too dry. Add the tomato paste. Keep stirring for 1 minute until the tomato paste is evenly mixed. Transfer to a bowl and set aside.