Thinly slice the flank steak against the grain and place into a medium bowl.
Season the steak with the garlic, ginger, rice vinegar, and salt. Mix well to make sure that the meat is evenly coated.
Set aside to marinate while preparing the veggies.
Wash, peel, and julienne the carrots.
Remove the florets from the head of broccoli and cut into small, equal sized pieces.
Add 2 tablespoons of oil to a large skillet on medium-high heat.
While the oil heats up, prepare the stir-fry sauce by combining tamari, water, brown sugar (or honey), tapioca starch, and sesame oil in a medium bowl. Once combined, set aside.
Add the meat to the hot skillet, spreading it out evenly so that it gets a nice sear on it.
Let pan fry for 2 minutes before flipping and cooking for another 1-2 minutes (or until the outsides are seared and deep brown). Do not worry if the steak is not cooked all the way through, it will finish cooking later in the sauce. Remove the meat from the pan and set aside.
Reduce the heat on the stove to medium heat and add 1 tablespoon of oil to the skillet.
Add carrots to the skillet and cook for about 2 minutes.
Add ginger, garlic, and broccoli to the skillet and cook for 5 minutes, constantly stirring to prevent the veggies from burning.
Add the meat and all of the sauce into the skillet. Cook the meat and veggies for an additional 5-8 minutes, stirring occasionally. The sauce will thicken and become glossy.
While the veggies cook, divide the rice equally between 4 bowls or meal prep containers and mix up the toasted sesame sauce.
Assemble the bowls – evenly divide the veggies and steak, and top with sliced green onions. Drizzle each bowl with the toasted sesame sauce and enjoy!