01 - 
                Preheat your oven to 350°F (175°C).
              
              
              
                02 - 
                In a large skillet, heat the vegetable oil over medium-high heat.
              
              
              
                03 - 
                Add the ground beef and cook until browned, breaking it up with a spoon as it cooks.
              
              
              
                04 - 
                Add the diced onion and minced garlic to the skillet and sauté until the onion is translucent.
              
              
              
                05 - 
                Stir in the mixed vegetables and cook for another 2-3 minutes.
              
              
              
                06 - 
                Add the cooked rice to the skillet, breaking up any clumps. Pour in the soy sauce and oyster sauce, stirring well to combine all the ingredients.
              
              
              
                07 - 
                Season with salt and pepper to taste.
              
              
              
                08 - 
                Transfer the mixture to a baking dish and spread it out evenly.
              
              
              
                09 - 
                Bake in the preheated oven for 15-20 minutes, until the top is slightly crispy.
              
              
              
                10 - 
                Remove from the oven and let it cool for a few minutes. Garnish with sliced green onions before serving.