Add sliced to steak to a medium sized mixing bowl.
In a small bowl whisk together garlic, soy sauce, water, sesame oil, ginger, and sriracha.
Pour HALF of the soy sauce mixture over the steak, stir to combine, cover, and refrigerate for at least 30 minutes.
Reserve the remaining soy sauce mixture for the sauce.
Once marinated, place the steak into the air fryer basket and cook at 375 degrees F. for 8 minutes.
Add the broccoli florests to a bowl, drizzle with olive oil and toss to combine and coat.
After the steak has cooked for 8 minutes, add the broccoli to the basket, and cook for another 4 minutes.
In a small bowl whisk together the reserved soy sauce mixture and cornstarch.
Microwave on high for 1 minute. At this point the sauce should be thick enough to coat the back of a spoon. If too thick add a splash of water or if too thin cook for another 15-30 seconds.
Remove the steak and broccoli from the air fryer, toss in the thickened sauce, and serve over rice.