Elinoar is right on the money
However - if you prefer to use supermarket-dried tomatoes instead of making your own from scratch, you can soften them BEFORE puting them in the oil.
Simply place them in a bowl and pour boiling water. Let soak for a few minutes till they soften and puff up a little - use your judgement here, but don't let them softer completely through.
Don't forget to dry your tomatoes before you cover them in oil.
