Indonesian beef meatballs, springy from pounded lean beef and tapioca flour, served in a clear garlic-pepper broth with noodles, greens, fried shallots and sambal — the bowl every bakso cart in Java sells.
Cut the 120 g of lean beef into 2 cm cubes, cutting away every scrap of sinew and fat, spread it on a plate and freeze for 20 minutes until firm and very cold — cold meat is what gives bakso its bounce.
Pound the chilled beef in a stone mortar, or pulse it in a food processor, with 1 clove garlic clove, 0.5 tsp salt, 0.25 tsp ground white pepper and 0.25 tsp bicarbonate of soda, adding the 45 ml ice water a spoonful at a time. Work only until you have a smooth, pale, sticky paste; stop and rest the machine if the paste starts to warm.
Scrape the paste into a chilled bowl and knead in the 30 g tapioca flour, then slap and throw the mixture against the side of the bowl for 2 minutes until it is glossy and springs back when pressed. Cover and chill for 15 minutes.
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