To the bowl of your food processor or blender, add the herbs, one of the chilis, lime juice, miso, a pinch of salt and 2 tbsp water.
Blend until well combined.
Meanwhile, blend herbs, one of the chiles, lime juice, miso, ½ tsp.
salt, and 2 Tbsp. water in a blender on high speed until well combined.
Slowly, drizzle in ⅓ cup oil and continue to blend until sauce is very smooth.
Taste sauce for heat; if it seems mild, add another chile or two. (The sauce should be slightly spicier than what you’re comfortable with because the overall dish will be far mellower once everything is combined)