Prepare the baking sheet by spreading a thin layer of olive oil over the pan.
Flatten the pizza dough ball, and stretch it out onto an oiled baking sheet. Starting at the center and working outwards, use your fingertips to press the dough to the corners of the pan. Turn and stretch the dough until it will not stretch further. Treat the dough gently. If a hole appears in your dough, push the dough back together to seal the hole.
Spread the dough with tomato sauce. Layer the tomato sauce with spinach, cheese, tomato, sardine, and basil in that order. Top it with a squeeze of lemon juice, a sprinkle of red pepper flakes, and minced garlic. Be careful not to overload the pizza with too many toppings, or your pizza will be soggy.
Bake pizza in the 450°F oven, until the crust is browned and the cheese is golden, about 10 to 15 minutes.
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Notes
Reduce sodium by purchasing 'low sodium' tomato paste and 'no salt added' sardines