Mix together the flour, salt and yeast in a bowl, add the water, oil and thyme and knead to a soft, smooth dough. Cover and leave to rise at room temperature for approx. 1 hr. until doubled in size.
Lightly dust the dough with flour, flatten a little and place on a baking tray lined with baking paper. Arrange the tomatoes on the dough.
for approx. 30 mins. in the bottom half of an oven preheated to 200°C, remove.
Heat the oil in a non-stick frying pan, fry for approx. 1/2 min. each side, arrange on the focaccia with the mozzarella and spring onions, season.