Steps
1. Heat the olive oil in a skillet over medium heat.
2. Add the sliced onions and sauté until they become translucent and slightly caramelized, about 5 minutes.
3. Increase the heat to medium-high, add the pork slices, and season with salt and pepper.
4. Cook the pork until browned and cooked through, about 5-7 minutes.
5. Pour in the soy sauce and stir well to coat the pork and onions.
6. Serve the pork stir-fry over the cooked rice and garnish with chopped parsley if desired.