Ina Garten's Green Goddess Dressing with Bibb Lettuce & Tomatoes

Ina Garten\'s Green Goddess Dressing with Bibb Lettuce & Tomatoes
1 cup mayonnaise
1 cup scallions
chopped, about 6-7 scallions
1 cup basil
1/4 cup lemon juice
freshly squeezed
2 tsp garlic
2 tsp anchovy paste
2 tsp salt
1 tsp black pepper
1 cup sour cream
3 heads bibb lettuce
3 whole tomatoes
Fun fact: Green goddess dressing was originally created at the Palace Hotel in San Francisco in the 1920's in honor of William Archer's hit play The Green Goddess. This recipe has been updated by Ina Garten, and I've changed it up a bit too. The original called for tarragon, but Ina is right on the money by using basil instead.

Dressing can be made in advance. Store in the refrigerator for up to 3 weeks.
Combine the mayonnaise, scallions, basil, lemon juice, garlic, anchovy paste, salt, and pepper in the food processor and blend.
Add the sour cream and process again until just blended.
Wash, process, and plate the lettuce. Cut the tomatoes into wedges and place on top of the lettuce. Top with dressing and serve.