What I normally do is take 6 ripe tomatoes, de-seed and chop quite finely and add to a bowl. Add 1 tbsp of balsamic vinager, plenty of salt and peper, around 6 fresh basil leaves (roughly chopped) 2 tbsp of yellow onion and 2 tbsp of olive oil, 2 cloves of garlic (minced), leave covered in the fridge for 1 hour. Use a tin loaf (supermarket) cut about 1" thick, toast one side under grill with a drizzle of olive oil and toast the other side the same but just until it starts to brown, spoon on your topping and add a handful of mozzerrella cheese until it bubbles / browns. - ENJOY!!