Add the vegetable stock along with the crushed red pepper, chili powder, and maple syrup. Bring to a boil and then reduce heat and simmer for 20-30 minutes or until thickened. Taste and season again with more of any of the spices you like: salt, pepper, crushed red pepper, chili powder, or maple syrup. Toss to combine and stir in the scallions and simmer for 3-4 minutes more. Turn off the heat.