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INSTRUCTIONS:
1 – Preheat the Oven:
Start by preheating your oven to 375°F (190°C). Grease a 9×13-inch baking dish and set aside.
2 – Cook the Beef:
Season the thinly sliced beef steak with salt and pepper.
Heat 1 tablespoon of olive oil in a large skillet over medium-high heat. Add the seasoned beef to the skillet and cook until browned, about 2-3 minutes per side. Remove the beef from the skillet and set aside.
3- Sauté the Vegetables:
In the same skillet, add the remaining tablespoon of olive oil. Add the thinly sliced onion, green bell pepper, red bell pepper, and mushrooms (if using) to the skillet.
Sauté the vegetables until they are softened and caramelized, about 8-10 minutes. Add the minced garlic and cook for an additional minute.
4 – Prepare the Sauce:
