With this one condition, it has just eliminated a huge chunk of foods. Grains are also not allowed.
Really? Yup. That means that bread, pizzas, burgers, etc. are out too. So, are processed meats such as hot dogs, salami, etc.
You are only expected to eat grass fed meats, fish, poultry, fruit, non-starchy vegetables such as broccoli, cauliflower, carrots, lettuce, spinach, etc. Eggs and vegetable oils such as olive oil, coconut oil, macadamia oil, etc. are allowed as fats. You can only consume these foods.
There are a few other foods you can consume while on the paleo diet. It would be best to get a paleo cookbook and learn what you can eat and how to transform these foods into tasty dishes. Paleo dishes can be tasty too.
Just because the diet is restrictive does not mean that it has to be boring. In fact, it is highly advisable that you have as many paleo recipes as possible at your fingertips. Since you have sacrificed so many foods that you considered delicious, your body will be craving these forbidden foods. Tasty paleo dishes will ease the mental torture.
Once you have gotten used to the diet, naturally your cravings will slowly decrease till there are none left. In fact, even the smell of junk food may turn you off in the future. Your body will be used to healthy food and will be repulsed by food that is not good for it.