Rinse and cook rice in your rice cooker according to manufacturer's instructions.

Marinate beef in 1 tsp sesame oil, half of the garlic & 1 1/2 Tbsp oyster sauce. Add salt and pepper.

Take a small bowl and add the rest of the garlic, white part of the green onions and 1/2 Tbsp oil. Mix and set aside.

Add 1/2 Tbsp oil to a large skillet or wok (I used a cast iron braiser) and turn heat to medium high. Add marinated beef and cook for 5-8 minutes, until browned. Remove beef and place onto a plate.

Add 3/4 cup water to the skillet and reduce heat to medium heat. Add broccoli & cauliflower and cover. Cook for about 5 minutes. Don't overcook the vegetables. Remove the vegetables and drain the water. Wipe the skillet with a clean paper towel if needed.

Return beef to the skillet and leaving room in the middle, add the garlic-green onion-oil mixture. Cook for 30-60 seconds and smash the garlic with the back of a wooden spoon. Incorporate the garlic mixture into the beef. Add back the broccoli and cauliflower. Add 1/2 tsp sesame oil & 2 Tbsp oyster sauce and mix together until heated through.

Season with salt and pepper. Garnish with remaining green onions and serve with rice.