The way I look at it, McDonalds double cheese burgers- hold the catsup, toss the bun is the ultimate fast-food LC way to go. Regionally, in the south where I live, Micky-D's is offering a double cheese burger for 99 cents. I'll pick up three or four of them and away I go.

According to their site, the burger, sans condiments, are zero carbs.