Switch your oven on to 70°C/ 50°C fan. This gives you the perfect environment for the yeast to rise the bread.
Prepare an 8 inch loose bottomed square loaf tin by brushing with oil (I use a handy oil spray) and then dust with flour.
Put the mix into a large bowl with 7g Allinson's dried easy bake yeast and 1 tbsp sugar and stir well.
Add 2 tablespoons vegetable oil, 1 tsp vinegar or lemon juice and 530g warm water (130g boiling water mixed with 400g cold water). Stir until thoroughly combined and dough like.
Add the 150g of sundried tomatoes, I cut these into thin strips with a pair of kitchen scissors. Also add the rosemary ad stir again until combined, then scrape into your prepared tin.
With wet hands (lets get messy) push the dough into the corners of the tin.
Next, using your, hands smooth 2tbsp of the oil from the sundried tomatoes into the top of the bread and make approx 12 holes in the bread.
Cover with an oiled piece of tin foil and place the loaf into your warm oven, leaving it for 15 - 20 minutes to rise - it should reach the top of your tin.
Once the dough has risen almost to the top of the tin, remove the tin foil (keep it) and turn the oven up to 230 degrees C (210 degrees fan/gas mark 7).
Before putting in the oven, poke the holes again (they may have filled in with the prove), then dot the focaccia with halved cherry tomatoes in a pretty pattern and liberally sprinkle with rock salt.
Replace the foil lid (you may want to spray with oil again) Bake for 40 minutes.
Remove the foil for the last 10 minutes to allow to brown (50 minutes in total).
Leave the loaf to cool in the tin for 5 minutes before carefully removing it and leaving it to cool on a wire rack on one side.