Salt-and-Pepper Shrimp (Tom Rang Muoi)

Ingredients (10)

• + 1 pound uncooked jumbo shrimp, in shell with heads attached add to pantry
• ✓ ⅛ cup cornstarch, or more as needed
• + 3 tablespoons peanut oil, divided add to pantry
• + 10 cloves garlic, pressed add to pantry
• + ¼ cup onion, minced add to pantry
• + 1 tablespoon minced ginger add to pantry
• + 3 scallions, chopped add to pantry
• + 1 ½ tablespoons minced jalapeno pepper add to pantry
• + ½ teaspoon kosher salt add to pantry
• + ½ teaspoon freshly cracked black pepper add to pantry