This is a fairly straightforward mixture of oriental flavours which complements a nice piece of fish really well. Serves two.
Spread the flour out on a plate and generously salt+pepper it. Then coat the fish fillet in it, and leave it there for now. Wash the lettuce.
Get a boiling pan of water and cook the noodles until just done (3 or 4 minutes). While that's happening, warm up a wok or frying pan to a hot heat with a dab of oil, and also warm up a frying pan to medium-hot with a good covering of oil.
Drain the noodles in a sieve. Let them dry off while you slice the garlic and stir-fry it in the wok for a minute of two. Then add the noodles and mix it in, still stir frying.
Chop the lettuce up, and put the tougher stalkier half of the bits in the wok. Stir. Chop the lime in two and squeeze one half into the wok. Stir fry briefly then take it off the heat while you fry the fish.
Put the fish fillets gently into the other pan and fry them for 3 or 4 minutes either side. While waiting for the fish to finish, spoon the noodles onto two plates as well as the lettuce. Sprinkle a little soy sauce over.
When the fish is done, drain it on some kitchen roll briefly before putting it on the plates. Then squeeze the remaining lime over everything.