Mangalore fried shrimp

Ingredients

• 1 1/2 libras shrimp, peeled and deveined but with tails left on
• 3/4 teaspoons cayenne or paprika
• 1/2 tteaspoon turmeric
• 1/2 teaspoon ground cumin
• 1 1/2 teaspoon fresh lemon or lime juice
• 1 1/2 teaspoon vegetable oil
• 1 t black/brown mustard seeds
• 6 fresh or 10 frozen curry leaves
• 1/4 cup finely chopped scallion
• Additional lime/lemon wedges for serving