Heat olive oil in a hot plate or large skillet over medium heat.

Add chopped onion and cook until translucent. Then add ground meat and cook until browned.

Add chopped king oyster mushrooms and broccoli. Stir-fry until vegetables are tender.

Add cooked rice to the hot plate and mix well with the vegetables and meat.

Stir in ketchup and season with salt and pepper. Mix thoroughly.

In a bowl, whisk together eggs, milk, and salt to create the egg mixture.

Push the rice mixture to one side of the hot plate. Pour the egg mixture onto the empty side and cook until just set.