Slice the zucchini into thin ½ circles and thinly slice the steak against the grain. Season the beef with ¼ tsp salt and ¼ tsp pepper and toss to coat. Set both ingredients aside.
Step 2
Place a deep wok over high heat and add 1 tbsp of tallow. Once smoking hot, add the zucchini and cook for 2-3 minutes. Season with the remaining salt and pepper and toss every 30 seconds until all sides of the zucchini are caramelized.
Step 3
Transfer the zucchini to a plate and add the ½ tbsp tallow to the wok. Once smoking hot, add half the beef and spread it into one layer. Let it cook for 1 minute until browned, then toss and cook for another minute until all sides are browned.
Step 4
Transfer the cooked beef to the plate with the zucchini and add the remaining tallow. Repeat the previous step with the remaining meat. Once cooked, return the zucchini and first batch of beef to the wok.
Step 5
Toss for 20 seconds to heat all the ingredients. Taste and adjust seasoning if needed. Serve immediately.