For ink sauce, heat oil in a wide saucepan, add onion and carrot and stir occasionally until starting to caramelise (10-15 minutes). Add garlic and cuttlefish trimmings and stir occasionally until vegetables are deep-brown and cuttlefish is golden (10-15 minutes). Add wine and simmer until reduced to about 50ml (4-5 minutes). Add stock and thyme, bring to the simmer, then skim any scum from surface. Add squid ink and simmer gently until well-flavoured and reduced to a coating consistency (1-1¼ hours). Strain through a fine sieve, season to taste and keep warm.
For nettle purée, stand nettles in a large bowl of cold water so dirt sinks to the bottom (10 minutes), scoop leaves from water with a sieve and drain. Blanch leaves until tender (2 minutes), drain, refresh, then drain well on absorbent paper. Heat oil in a saucepan over medium heat, add shallot and garlic, stir occasionally until tender and translucent (5-10 minutes), add wine and reduce to 1 tbsp (5-10 minutes). Add stock, simmer until reduced by half (10-15 minutes), add nettles and simmer for 1 minute. Transfer to a food processor, blend until smooth, season to taste and keep warm.
Blanch cuttlefish until tender (30 seconds), refresh, then drain on absorbent paper.
Trim each fish fillet into two 3cm x 8cm rectangles and season skin with sea salt. Heat two frying pans over medium heat, add 50ml olive oil to each pan, and add half the fish, skin-side down, to each pan. Reduce heat to low, cook until skin is golden and crisp (2 minutes), remove pans from heat, turn fish and add a little lemon juice to each pan. Drain fish on absorbent paper.
Place a spoonful of nettle purée on each plate, top with one fish finger. Toss blanched cuttlefish in a little lemon juice, divide among plates, dollop with ink sauce and serve.
This recipe is from the September 2012 issue of Australian Gourmet Traveller.