Mixed Seafood Grill (Grigliata di Pesce)

INGREDIENTS: (6 servings)
2 pounds uncooked large Shrimp, peeled but with tails, deveined
2 pounds firm white Fish Fillets (such an halibut), cut into 2-inch-wide stripes
2 pounds cleaned fresh Squid, opened (reserve tentacles for another use)
1/4 cup fresh Lemon Juice plus Lemon Wedges for garnishing
2 tablespoons chopped fresh Parsley
3 Garlic cloves, sliced thinly
2 teaspoons Paprika
tablespoons of olive oil, divided

Whisk 4 tablespoons oil, lemon juice, parsley, garlic, and paprika in a small bowl.
Season with salt and pepper.
Cover and let it rest for 6 hours.
Bring to room temperature before using.
Prepare barbecue (medium-high heat).
Arrange seafood on baking sheets, drizzle with 3 tablespoons of oil and sprinkle with salt and pepper.
Put seafood to grill.
Cook for about 4 minutes per side for fish, 2 minutes per side for shrimp, and 30 seconds per side for squid.
Put on a dish, spoon seasoning over and garnish with lemon wedges.