Fresh Dill Pasta Salad

INGREDIENTS

• 1 (8 ounce) package seashell pasta
• 1 cup mayonnaise
• 1/4 cup sour cream
• 1 1/2 tablespoons lemon juice
• 1 1/2 tablespoons Dijon mustard
• 1/4 cup chopped fresh dill weed
• 1/4 teaspoon ground black pepper
• 2 (4 ounce) cans small shrimp, drained
• 1/2 cup chopped celery
• 1/2 cup chopped seeded cucumber
• 2 tomatoes, diced
• 3 tablespoons minced shallot
• salt to taste