For a smoky flavor, consider adding a pinch of smoked paprika to the spice blend. If you don't have an outdoor grill, a grill pan or even a hot oven (400°F/200°C) will work. Roasting time will be similar. Adjust the amount of Sriracha to your preference. A little goes a long way! The sauce can be made ahead of time and stored in the refrigerator for up to 3 days. Feel free to substitute other herbs like parsley or chives for the cilantro.