I finally found the secret to the most tender beef!

I finally found the secret to the most tender beef!

Ingredients
beef: 800 g (28 oz)
starch: 25 g (0.9 oz)
sugar: 20 g (0.7 oz)
soy sauce: 20 ml (0.7 fl oz)
balsamic vinegar: 15 g (0.5 oz)
vegetable oil: 20 ml (0.7 fl oz)
olive oil: 20 ml (0.7 fl oz)
sodium bicarbonate: 10 g (0.4 oz)
garlic: 20 g (0.7 oz)
white wine: 30 ml (1.0 fl oz)
soy sauce: 20 ml (0.7 fl oz)
balsamic vinegar: 15 g (0.5 oz)
water: 150 ml (5.1 fl oz)
black pepper: 10 g (0.4 oz)
scallions: 30 g (1.1 oz)
onion: 1 pc
Additionally
potatoes: 400 g (14 oz)
water: 800 ml (27 fl oz)
garlic: 1 pc
soft butter: 20 g (0.7 oz)
milk: 20 ml (0.7 fl oz)
black pepper: 5 g (0.2 oz)
salt: 10 g (0.4 oz)
dill: 10 g (0.4 oz)
parsley: 10 g (0.4 oz)

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