Puree 10 g fresh ginger, 150 g onion, 12–15 g garlic, and 18–24 g green chilli in a blender with a splash of water until smooth. Scrape into a bowl and stir in 2 tablespoon vinegar or lime juice, salt to taste, and the marinade spice.
Place 750 g fish fillets in a wide dish and rub thoroughly with the wet marinade. Cover and refrigerate for at least 2 hours.
Set out 2 beaten eggs in a shallow bowl and spread 120 g breadcrumbs over a wide plate. Dip each marinated fillet into the egg, then press into the breadcrumbs until evenly coated.
Warm 228 g vegetable oil in a large frying pan over medium heat. Working in batches of two, fry the fillets for 3–4 minutes on the first side, flip gently, and cook for 1 minute longer until golden brown. Transfer with a slotted spoon to paper towels to drain.
For binding, use about 10 g chickpea flour mixed with 20 ml water per egg and rest for 10 minutes. Denser and nuttier; not suitable for baking or coating in the same way.
Use 20% to 25% of the weight (1 g for every 4 to 5 g fresh). Stir into the gravy; adds peppery heat and warmth, though it misses the crisp, zesty kick of raw root.
Use 80% of the weight, finely shredded and browned slowly with a pinch of asafoetida. Replicates the bulk and natural sweetness in gravies without allium.
Use 15% to 20% of the weight (about 1 g for every 5 to 6 g fresh cloves). Whisk into sauces; gives a savoury, toasted garlic flavour without raw pungency.
Use the same weight. Squeeze fresh and strain; add off the heat to keep it bright. It is sharper and more aromatic than malt vinegar, so taste after using 80% and top up.