Bring a large pot of water to boil
Juice lemons to yield 4 tablespoons lemon juice
Cook Medium Shells 1 minute under recommended package cooking time
Drain and spread on a baking sheet to cool
Toss with 1 tablespoon olive oil
Combine lemon juice, garlic, salt and pepper in a small bowl
Gradually add remaining olive oil
Mix well and set aside
Heat 1 tablespoon olive oil in a medium skillet
Add asparagus and sauté for 2 minutes
Add seafood to skillet and sauté for 5 minutes or until cooked through
Transfer to a large bowl to cool
Add pasta, tomatoes, and herbs to cooled seafood mixture
Mix well
Add vinaigrette dressing
Mix well and refrigerate 1 hour before serving