Heat the oil in a frying pan and then tip in the tomatoes, season and simmer for 5 mins until the sauce has thickened.
Heat oven to 220C/200C fan/gas 7. Divide the tomato sauce between the pizzas, spreading almost to the edge. Dot over the spinach, add your toppings and drizzle with a little oil.
Cook for 5 mins, then crack an egg onto each pizza. Swap the baking sheets, then cook for 10 mins more or until bases are cooked through. Drizzle the basil and rocket with a drop of oil and the lemon juice. Scatter over the pizza before eating.