Risotto ai Gamberi (Shrimp Risotto) Recipe

Ingredients (13)

• 1 pound (455g) medium to large head-on shrimp (see note)
• 1/4 cup (60ml) extra-virgin olive oil, divided
• 1 medium (8-ounce; 225g) yellow onion, half cut into large dice, half finely chopped, divided
• 2 medium garlic cloves, crushed
• 1 tablespoon (15g) tomato paste
• 2 sprigs fresh parsley plus 1 packed cup (15g) leaves and tender stems, finely chopped, divided
• 3/4 cup (180ml) dry white wine, divided
• 7 cups (1.5L) water
• Kosher salt
• 2 cups (400g) short grain risotto rice, such as carnaroli or arborio
• Pinch red pepper flakes (optional)
• 1 cup (240ml) tomato passata
• 1 tablespoon (15ml) fresh lemon juice from 1 lemon, plus lemon wedges for serving