Many green vegetables are typically low in carbohydrates. The fiber they contain brings about a very moderate insulin response. This makes them an ideal choice for fat loss food rather than grains. Grains can raise blood sugar quickly in the same way as table sugar. Some of the best fibrous carbohydrates include:

Kale
Broccoli
Cabbage
Lettuce
Cauliflower
Mushrooms
Green Beans
Onions
Asparagus
Spinach
Peppers
Cucumber