Prepare the Margherita Pizza Sauce. Add crushed tomatoes, olive oil, garlic, and salt to a medium saucepan and cook over medium heat, covered, for about 5 to 10 minutes or until heated through. Stir occasionally.
Preheat the grill pan on the stove over medium-high heat and lightly brush with cooking oil.
Flour a clean work surface and stretch the 2 dough balls into roughly 8-inch circles. One at a time, flatten the dough ball into a disc and gently press around the edges to form a small rim. Then use both hands to stretch from the center outwards, working your way around the dough in a circle until evenly stretched.
Transfer one of the pizza crusts to the grill pan. Cook until the bottom is crisped, about 2 to 3 minutes, rotating the dough by 90 degrees halfway through.
Lower the heat and transfer pizza crust to a cutting board or other work surface, grilled side up. Quickly top with about 1/3 to 1/2 cup of the sauce, half of the mozzarella, and 4 to 5 fresh basil leaves, then transfer the pizza back onto the grill pan.
Cover and cook until the bottom is crisped and toppings are warmed through, about 5 minutes, rotating the pizza by 90 degrees halfway through.
Transfer cooked pizza to a cutting board and sprinkle with a pinch of sea salt. Let cool for at least 2 minutes before slicing. Turn the heat back to medium-high and repeat steps 4-6 to cook the second pizza.
Slice pizzas with a large chef's knife and serve hot.