Combine salt, oregano, and basil to make Italian seasoning and set aside.
Shred mozzarella cheese or pull into small chunks if grating is difficult.
Unwrap 7 sticks of string cheese, cut one stick in half for two shorter pieces.
Prepare heart-shaped pepperoni using cookie cutter or knife and scissors techniques.
Roll out pizza dough carefully into a large circle or irregular shape.
Sprinkle cornmeal on work surface and prepare to transfer pizza.
Place dough in the center of surface, arrange string cheese sticks in a double V heart shape.
Preheat oven to 425ºF with pizza stone or sheet pan inside.
Cut and fold dough to stuff the crust around the string cheese, seal tightly.
Brush olive oil evenly over the stuffed crust.
Spread tomatoes inside pizza dough and sprinkle Italian seasoning.
Add shredded mozzarella evenly over the pizza, then arrange heart-shaped pepperoni on top.
Transfer pizza to oven using stone or sheet pan.
Bake for 13 to 15 minutes until cheese is bubbly and golden.
Remove pizza from oven and rest 2 to 3 minutes before slicing and serving.