Form sticks. Cut the mozzarella block into strips about 1-inch thick, each piece should be about 2-3 inches long, otherwise they’ll break while getting dredged.
Set up breading station. Add ¼ cup all purpose flour to the first bowl. In the second bowl, whisk together oat milk, the remaining 2 tablespoons flour, garlic powder, onion powder, salt, and black pepper until well combined and smooth. In the third bowl, mix together the breadcrumbs and Italian seasoning.
Dredge. Dredge the vegan cheese sticks first in the flour bowl, then in the wet batter, then in the seasoned breadcrumbs. Transfer them to a plate.
Shallow fry. Heat a large skillet over medium heat with a thin layer of avocado oil. Once hot, cook on all sides until golden brown.
Serve. Transfer the cooked mozzarella sticks to a paper towel to help absorb some of the excess oil. Serve with your favorite dipping sauce.