Answer: Scallions a keto-friendly, as its carb impact is almost zero.
Scallions, also known as "green onions" are closely related to onions and leeks. They have the onion's distinctive taste, but in a milder form.
Each serving of scallions (1 tbsp chopped) contains 0.3 g of net carbs. If you ate enormous quantities of them, you might find yourself knocked out of ketosis. The normal amount of scallions you'd find in most recipes is so small that the carbs are effectively negligible. Eat them and enjoy!