Peppers, tomatoes, cucumbers, spinach, broccoli, celery, cauliflower and other veggies are vital if you want to lose belly fat and regain your health. Most vegetables are high in fiber, and fiber provides bulk to your meals which makes you feel full faster, reducing the amount of food you eat in a meal.
Fiber is also important for elimination as it keeps you regular. Elimination of waste is very important when you are trying to lower your weight. Being constipated is no fun at all. I recommend you eat your veggies raw, as not cooking them is the best way to get all the nutrients from veggies.
The cooking process tends to lower the nutrient levels in vegetables, meaning you get less fiber and other important nutrients after cooking.