Use this vinaigrette to prepare chef Stephanie Izard's Grilled Broccoli Over Blue Cheese Dressing.
Place vinegar, shallots, mustard, soy sauce, Sriracha, harissa, and lemon zest and juice in the jar of a blender. With the machine running, slowly add olive oil to emulsify. Store in an airtight container, refrigerated, until ready to use, up to 3 days.