Follow these simple steps to create your delicious Black Pepper Udon:

1. Cook the Udon Noodles: In a large pot of boiling water, cook the udon noodles according to package instructions. Drain and set aside.
2. Prepare the Sauce: In a small bowl, mix soy sauce, oyster sauce (if using), black pepper, sesame oil, and sugar. Stir until well combined and set aside.
3. Heat the Oil: In a large wok or skillet, heat the vegetable oil over medium-high heat.
4. Sauté Aromatics and Vegetables: Add garlic and ginger to the pan. Sauté for about 30 seconds until fragrant. Add the sliced onion and bell peppers. Stir-fry for 2-3 minutes or until they begin to soften.
5. Add Broccoli and Snap Peas: Toss in the broccoli florets and snap peas. Continue to stir-fry for another 3-4 minutes until all vegetables are tender yet crisp.
6. Combine All Ingredients: Add the cooked chicken or tofu to the pan, then add the cooked udon noodles. Pour in the prepared sauce and toss everything together. Stir-fry for an additional 2-3 minutes until everything is heated through and well combined.
7. Taste and Adjust: Taste and adjust seasoning with salt, black pepper, or more soy sauce, if needed.
8. Serve Hot: Remove from heat and transfer to a serving dish.
9. Garnish: Sprinkle with chopped green onions and sesame seeds before serving.

These steps will guide you to making the perfect Black Pepper Udon dish that is both flavorful and satisfying!