Marinated Shrimp Cocktail in Lettuce Cups

Ingredients

• 1 lb (500 g) large shrimp, peeled and deveined (leave tails on)
• 1 tsp (5 mL) Old Bay or other seafood seasoning
• 1 tsp (5 mL) grated lime zest
• 1/2 cup (125 mL) fresh lime juice
• 3 tbsp (45 mL) pickling spice
• 1/2 cup (125 mL) bottled seafood or chili sauce
• 1/4 cup (60 mL) no-salt-added ketchup
• 1 tsp (5 mL) prepared horseradish
• 1 head green-leaf lettuce (about 8 oz/250 g)
• 4 scallions, thinly sliced