Step 1

Cut beef into strips that are ~ 5mm thick, 1cm wide and about 5cm long (1/5" x 2/5" x 2"). If using shortribs, trim excess fat, cut the meat off the bone. Then cut each piece in half lengthwise (to form 2 "steaks") then slice into 5mm thick. (See step photos in post or video at 0.11s, Note 6)

Step 2

Marinate - Put beef in a bowl. Add marinade ingredients, then mix. Set aside marinate while you proceed with recipe, ~15 - 20 minutes is all it needs. (Note 5)

Step 3

Sauce - Mix the Sauce ingredients in a very large mixing bowl.

Step 4

Noodles - Cook sweet potato noodles per packet directions (normally 8 min in boiling water). Drain, briefly rinse under tap water then shake off excess water well. Add noodles into the bowl with the dressing. DO NOT MIX.

Step 5

Batch 1 - Heat 2 tablespoons of oil in a large non-stick pan (30cm/12") over high heat. Cook the brown onion, white part of green onion and shiitake mushrooms with 1/2 tsp salt for 2 1/2 to 3 minutes, stirring constantly, just until starting to soften but not going golden. Pour on top of the noodles - don't mix yet!

Step 6

Batch 2 - Using the same pan still on high heat, heat 1 tbsp oil then cook the carrot and capsicum for 1 1/2 minutes, constantly stirring. Add spinach, green onion and the final 1/2 tsp salt. Keep cooking for 1 1/2 minutes until the spinach is wilted. Transfer into the noodle bowl - still don't mix!

Step 7

Cook beef - In the same pan, heat the final 1 tbsp of oil still on high heat. Add beef and cook for 1 1/2 minutes until very lightly golden and just cooked through. Add to the noodle bowl. Don't mix!

Step 8

Mix! Add most of the sesame seeds (reserve some for topping). NOW you can mix! Toss, toss, toss.

Step 9

Serve - Transfer into a serving bowl, sprinkle with remaining sesame seeds. This is meant to be eaten warm, not piping hot. Eat!