Chicken Caesar Pasta Salad

Name: Chicken Caesar Pasta Salad
Ingredients: 1 cup mayonnaise; 1/3 cup sour cream; 3 cloves garlic minced; 2 tbsp lemon juice; 2 tsp Worcestershire; 1 pound penne pasta; 6 leaves romaine lettuce large, thinly sliced; 1 1/2 cups grape tomatoes halved; 4 green onions chopped; 1/2 cup Parmesan cheese shredded; 1/2 tsp black pepper; 2 chicken breasts grilled, sliced