Weigh out the ingredients into your mixing bowl. Add 2 teaspoons of salt and the packet of yeast. Give everything a light whisk together. Lightly flour your work surface now, whilst you have dry hands. Next make a well in the middle of the bowl and pour in the the olive oil and water to the bowl. Next mix everything together with your fingers until you have one big sticky lump of dough.
Tip the contents onto the floured work surface and start kneading. This will take about 10 minutes, although if this is your first time making dough, it's probably best to add a couple of minutes so you can get the hang of it. To knead, use the heel of your hand and push the mix away from you, stretching the dough. At the same time, use the fist of your other hand to pull the dough towards you. Then fold the dough back on itself so that you have the same rough shape as you started with, turn the dough 90 degrees and repeat this for 10 minutes. Everything is super stickyto start with and your hands will be covered with the dough but don't worry. Keep repeating the process of pushing and pulling the dough, folding it back up and turning. After a few minutes, you can start to pick the dough from your hands and knead onto it, to pick up the bits. If the dough is completely sticking to the work top, then add a little flour to your surface from the ramekin you set aside. After about 5 minutes, the texture will start to change, and the dough will be starting to stretch easier. Keep picking the bits off your hands, or lightly rub your hands together and knead knead knead for 10 minutes. The way to tell that the dough is properly kneaded is by the fact that it will have become really stretchy and when you knead it, it stretches loads and doesn't break.
Take a large bowl and put a little oil in the bottom and spread it around with your hands so that the bowl is lightly oiled. Put the dough into the bowl and add a little oil to the top, rubbing all over with your hands. Now all you need to do is cover the bowl with a clean tea towel and leave to rise for about 1 - 1.5 hours. An airing cupboard is perfect. The dough needs to roughly double in size, that's how you know it's done.
Once the dough has risen, it's time to roll it out. Preheat your oven to 240c. Lightly flour your work surface and then tip your bowl up and empty the dough onto the surface. Dab your knuckles in the flour and then lightly punch the pizza so that it flattens. (knocking the air out). Divide the dough in 2 (one bit for each pizza) then shape it again into a rough circle with your hands. Pinch the ends together and you should be fine. Now you need to roll the dough into the shape of your tray. Add another little sprinkle of flour onto the work surface and then a little flour to the rolling pin. Roll out the dough checking occasionally that the dough isn't sticking. Once you have it to the shape you want, pop it on your pizza tray. Repeat the process with the other half of dough until you have 2 pizza bases.
Clear down your surface and bring in your toppings. Pour onto the bases 3-4 tablespoons of passata and spread with the back of a spoon. Now it's time for the toppings. Arrange the onion, chorizo & mushrooms in whatever pretty way you want. Next generously scatter over some of the italian seasoning along with a good pinch of salt & pepper. Lastly, sparingly sprinkle some cheddar and mozzarella over the pizza. Repeat with the other pizza then bake in the oven for 12-14 minutes and you're done!
I hope that you enjoy it.