You can easily find a South Beach Diet recipe incorporating your favorite type of meat. You can snack on meat, too, such as a turkey roll-up. Nuts are a protein-rich and filling, convenient snack as well.
This is not to say that Phase 1 is an all-you-can eat meat-poultry-seafood buffet! You most definitely shouldn't limit yourself to only these foods. You can -- and should --- also eat vegetables, eggs, cheese, and salads.
With the South Beach Diet, you can eat until you are satisfied. This shouldn't be a problem since the meal plans include three meals, a mid-morning snack, a mid-afternoon snack, and even dessert after dinner!