Prepare the dough following the instructions in Basic pizza dough recipe in 'goes well with', right.
Thickly slice the chorizo and pan-fry until crisp. Remove and set aside. Cook one side of the pizzas.
Crush 2-3 of the tomatoes with your hands and drain in a sieve, then spread on the cooked side of the pizzas. Top with both cheeses, the pepper and chorizo. Season and add chilli flakes if you like it hot. Grill, covered, until the cheese is melted. Finish with the spinach leaves and shavings of Manchego.