Grilled Short Ribs with Pickled Daikon

Name: Grilled Short Ribs with Pickled Daikon
Ingredients: 4 red Fresno or 3 serrano chiles, halved, seeds removed; 3 lemongrass stalks, bottom third only, tough outer layers removed, coarsely chopped; 1 3 piece ginger, peeled, thinly sliced; 3 garlic cloves, smashed; 1 Tbsp. light brown sugar; 1 tsp. toasted sesame oil; ¼ cup vegetable oil, plus more for grill; 5 Tbsp. seasoned rice vinegar, divided; 3 lb. ¼–½-thick crosscut bone-in beef short ribs (flanken style); Kosher salt; 6 oz. daikon, peeled, halved lengthwise, thinly sliced crosswise