In a large bowl, combine 1½ cups all-purpose flour, active dry yeast, salt, and dry ginger. Whisk to combine.
In a measuring cup, combine water and pineapple juice. Heat in a microwave until warm (110-115 degrees on an instant-read thermometer).
Pour the water/pineapple juice into the flour mixture and stir well to combine.
Add the additional flour to the bowl and stir to form a soft dough.
Turn the dough out onto a floured surface and hand-knead in additional flour (for 5-7 minutes) until the dough is no longer sticky.
Place the dough into a lightly oiled bowl, turn to coat, and cover with plastic wrap to rise in a warm, draft-free place until doubled (approximately 60 minutes).
To make the pizza:
Brush 1½ tablespoons oil on the bottom of a large skillet, and sprinkle with cornmeal.
Dived the risen dough into two pieces, with the bottom dough being slightly larger than the top dough.
Press the larger of the two doughs into the skillet, covering the entire surface.
Top the dough with your choice of prepared BBQ sauce, chopped ham, pineapple, red onion, and shredded mozzarella cheese, making sure to leave a ½" border around the circumference of the dough.
Roll or press the second dough out to a 12" round disc, and gently place the top dough over the pizza fillings in the skillet.
Cut a small vent hole in the center of the top dough and firmly press the top and bottom dough together to seal (I used the back of a measuring spoon).
Beat one egg and gently brush over the entire surface of the top dough.
Allow the pizza to sit and rest for 20 minutes before baking.
Preheat oven to 375-degrees Fahrenheit (190 degrees Celsius).
Bake the Hawaiian stuffed pizza in the preheated oven for 40-45 minutes, or until the crust is puffed and a deep golden brown.
Cool for 15 minutes on a wire rack before slicing and serving.
Notes
Store any leftovers in an airtight container in the refrigerator for up to 5 days.May be frozen. Wrap well or store in an airtight freezer container for up to 3 months.