First, make the dough. In a large mixing bowl or the bowl of a stand-mixer, combine the flour, salt, sugar and yeast. Stir to combine.<br></br>
In a separate bowl or saucepan, combine the milk and water and heat just till you can comfortably dip a finger in it, about lukewarm. Pour the warm liquid into the flour mixture.<br></br>
Knead the dough using the dough hook (or your hands, though it will take longer), until it is almost smooth and elastic, though it will still be a little sticky. Pour in the oil and continue kneading. I needed to add 2 to 3 more tablespoons of flour at this stage, if your dough feels too oily or sticky, you may need to as well.<br></br>
Knead the dough till it is completely smooth and soft, then turn out onto a lightly floured counter and shape into a ball. Lightly oil the mixing bowl, pop the dough back in and cover with clingfilm. Set aside to double for 1 to 3 hours, depending on the warmth in your kitchen. You can also turn the oven to 100C for a few seconds, turn it off and place the bowl inside to kickstart the rise.<br></br>
While the dough is rising, combine the mozzarella and ricotta in a small bowl and set aside.<br></br>
In a shallow pan on low heat, melt 1 tbsp butter and add the garlic. Fry till lightly golden, then add the spinach and cook till it's wilted and darkened. Season with salt and pepper and set aside.<br></br>
Once the dough has doubled, press it down lightly with your fingers, cover again with clingfilm and set aside for 30 minutes. Preheat the oven to 220 C.<br></br>
Now transfer the dough to a lightly floured surface or silicone mat (for easy clean-up). Cut into 4 equal parts. Roll each part out into a roughly 9" circle, preferably on a silicon baking mat which you can transfer easily to a baking tray.<br></br>
Roll the edges of the circle inwards and twist the ends together to create a 'boat' shape.<br></br>
Fill the center with 1/4th of the cheese mixture, then top with 1/4th of the spinach. Slide the mat onto a baking tray and bake for 15 minutes, rotating the tray halfway for even browning. I turned my oven to the broil setting for a couple of minutes for a little extra browning. <i>For a little bit of a glaze on the crust, mix 1 tbsp cream with 1 tsp water, then brush it onto the edges.</i><br></br>
Repeat with the remaining three portions of dough and dive in!