Step 1

Slice steak, across the grain, into 1/4 inch thick strips (see picture tutorial HERE), and place in a large plastic bag.

Step 2

Add mirin and soy sauce and massage into the meat. Add cornstarch, seal the bag and toss/massage to coat the meat.

Step 3

Let meat marinate for about 10 minutes or so.

Step 4

In a medium mixing bowl, whisk together sauce ingredients and set aside.

Step 5

Slice vegetables and set aside.

Step 6

Add sesame oil to wok (or large saute pan) and heat over MED-HIGH heat.

Step 7

Add beef to hot pan (just enough to cover the bottom of the pan - you'll probably want to do at least 2 batches), and saute about 2-3 minutes. Remove beef to a plate and cook remaining batches.

Step 8

Add sliced vegetables to the hot pan and cook about 1-3 minutes (depending on how tender you want them), stirring often.

Step 9

Pour in Szechuan sauce and cook about a minute, until slightly thickened.

Step 10

Add cooked beef and turn to coat in the sauce.

Step 11

Serve over Veetee Dine In Rice.