Preheat the oven according to the Wewalka package instructions (400° F for convection, 425°F for conventional).
Unroll the dough disk from the parchment paper. Then place the parchment paper as a liner for your pizza pan. Lay the dough disk on top of the parchment paper and pat it down to smooth any creases left from being rolled up.
Brush the olive oil and then the garlic onto the surface of the dough, spreading evenly and going very close to the edges.
Top the garlic and olive oil with the drained and crumbled tuna, spreading evenly. Sprinkle lightly with salt.
Add the Kalamata olives and onions, then top those with the oregano and parmesan.
Finally, top everything with the shredded mozzarella, making sure to cover the tuna meat completely.
Bake according to the Wewalka instructions or until the mozzarella is fully melted and starting to caramelize.
Slice and serve hot, drizzling slices with more olive oil, if desired