Creating Omurice can be straightforward if you follow these simple steps:

1. Prepare the Rice: If not using day-old rice, cook rice and let it cool to minimize stickiness.
2. Cook the Filling: In a large skillet, melt 1 tablespoon of butter over medium heat. Add the diced onion and bell pepper; sauté until softened (about 3 minutes).
3. Add Protein: Stir in the diced chicken (or your chosen protein) and cook until no longer pink. Add the frozen peas and mix well.
4. Season the Rice: Add the cooked rice to the skillet. Stir in ketchup, soy sauce, salt, and pepper. Cook for about 5-7 minutes, stirring occasionally, until everything is well combined and heated through.
5. Prepare the Eggs: In a bowl, whisk together the eggs, milk, salt, and pepper until fully combined.
6. Cook the Omelet: In a separate nonstick skillet, melt the remaining tablespoon of butter over medium heat. Pour in the egg mixture and swirl to coat the pan evenly.
7. Let it Cook: As the eggs start to set around the edges, gently run a spatula around the sides to allow uncooked egg to flow out.
8. Add the Filling: Once the eggs are mostly set but still slightly runny on top, spoon the rice mixture into the center of the omelet.
9. Fold the Omelet: Carefully fold the edges of the omelet over the filling. Slide it onto a plate, seam side down.
10. Garnish: Drizzle additional ketchup or demi-glace over the top before serving for extra flavor.

Follow these steps, and you'll create a flavorful Omurice that will impress everyone around the table!