Place the oil in a skillet over medium heat.
Add the garlic and ginger and sauté for about 2 minutes. Stir frequently.
Add the onions and sauté, stirring frequently, for about 3 minutes or until translucent.
Add the bell pepper and continue sautéing for 2 minutes.
Add the potatoes, stir, and cover.
Reduce heat to medium and cook for about 15 minutes, stirring frequently, until the potatoes are soft.
Add the soy sauce and pepper and stir.
Cook for another 5 minutes on low.
Serve.