Preheat the oven: preheat the oven to 180°C / 350-375°F / Gas Mark 4-5.
Garlic and spinach: place a large frying pan on the stove top, turn the heat to high, add the olive oil and garlic and cook for 1 minute.
Chilli, salt and pepper: then add the chilli flakes, salt and pepper to the pan. Stir to combine with the sauteed garlic.
Spinach: add the spinach leaves to the pan and stir, allowing them to soften and wilt. Once done, transfer them to a bowl.
Feta: hold the block of feta cheese over the bowl of spinach, then use your fingers to break the cheese and allow the crumbles to fall into the bowl. Stir this mixture to combine.
Pizza base: spray a pizza tray with cooking oil, then use a rolling pin to push the dough into a semi round shape and place it onto the oiled tray.
Sauce: dollop the Greek yogurt onto the pizza base and use the back of a spoon to spread it out into a thin layer.
Spinach and feta: spoon the combined spinach and feta mixture onto the Greek yogurt. Spread so that it is in one consistently even layer.
Cheese: sprinkle each of the mozzarella and grated cheese over the top of the spinach and feta mixture.
Oven bake: place the pizza into the oven (uncovered) and allow it to bake for 15 to 20 minutes. Use an oven mitt to remove the tray from under the pizza (slide it off) and place it onto a lower shelf for the last 5 minutes of cooking to allow the base to crip up.
Serve: once the pizza is cooked, use oven mitts and a pair of tongs to slide the pizza out and place it onto a chopping board. Allow it to rest for 1-2 minutes (to set the cheese layer) and then use a pizza wheel to slice it into pieces. Garnish with basil leaves and serve warm.