Authentic Mexican Shrimp Cocktail

Authentic Mexican Shrimp Cocktail 1/3 cup Spanish onion, chopped 1/4 cup freshly squeezed lime juice 1 pound chilled cooked medium shrimp - peeled, deveined, and tails removed 2 roma (plum) tomatoes, chopped 1 cucumber, finely chopped 1 stalk celery, finely chopped 1 jalapeno pepper, seeded and finely chopped 2 teaspoons salt 2 teaspoons ground black pepper 1 1/2 cups chilled tomato and clam juice cocktail (such as Clamato®) 1 cup chilled ketchup (such as Heinz®) 1 bunch fresh cilantro - stems discarded and leaves chopped 2 tablespoons hot pepper sauce (such as Valentina®) 2 avocados - peeled, pitted, and chopped Mix onion with lime juice in a small bowl and allow to stand for 10 minutes. Meanwhile, toss shrimp, roma tomatoes, cucumber, celery, jalapeno, salt, and black pepper in a bowl until thoroughly combined. Whisk tomato and clam juice cocktail, ketchup, cilantro, and hot pepper sauce in a separate bowl; stir dressing into shrimp mixture. Gently fold in avocados. Cover and chill thoroughly, at least 1 hour.