Heat the olive oil in a large skillet over medium-high heat before adding the broccoli and onion. Season with a pinch of salt and pepper. Cook for 5-6 minutes, stirring every 2 minutes or so, until the veggies soften and begin to brown in spots. Transfer to a bowl and set aside.
Add the beef to the pan and brown one side for 2-3 minutes before breaking apart and fully cooking. Mix the sauce ingredients together and add to the fully cooked ground beef. Stir to fully coat the beef then leave untouched for 2-3 minutes until the sauce reduces and begins to caramelize on the bottom.
Add the veggies back to the pan and toss together with the beef.
Serve over the microwaved steamed rice with sliced green onions.
