In a large pot, add 3 quarts of water and a couple dashes of salt, set over a high heat and bring to a boil. While waiting for water to boil, combine in a large mixing bowl: fish sauce, lime juice, sugar, crushed red pepper, and a dash of salt. Stir until sugar dissolves. Then add onion and carrots. Rinse the squid under cold water. Slice the bodies horizontally into very thin rings. Add to boiling water and cook until tender and opaque (should only take 30 seconds to a minute). Drain squid and add it to the mixing bowl with the sauce. Then combine the remaining ingredients: lettuce, mint, and cilantro. Ta da!! Now serve!