Prepare the seafood

• Pull the tails off the cooked shrimp and place them in a large bowl.
• Tear the imitation crab into smaller pieces and add it to the shrimp.

Season the seafood

• Add Old Bay seasoning, garlic powder, dill weed and a little salt to the crab and shrimp.
• Mix well so the seasonings coat all the seafood.

Add the vegetables

• Add the chopped celery and chopped red onion.
• Stir to combine.

Cook the pasta

• Boil the rotini in salted water until tender.
• Drain the pasta and add it to the seafood mixture.

Bind with mayonnaise

• Add the mayonnaise and stir everything together.
• Add more mayonnaise if needed, then taste and adjust with more Old Bay, salt, pepper and garlic powder.

Chill and serve

• Refrigerate the salad until ready to serve.
• Serve cold as a side or potluck dish.