Trader Joes is selling in their refrigerator section by the veggies this great snack. Four cauliflower patties in a package. Only 1.5 g of carbs per patty, four in the package. I took one out, put some cheese on one, put it in the microwave, folded it up and had a mini taco (but it was so good and so low carb).
It is very tasty and satisfying. I recommend them. Not the cheapest, and you can make your own riced cauliflower patty, but this is already done.