Here is Joy's recipe for the salad dressing from the Terrific Tuesday taco salads:
Copycat Cafe Rio Green Ranch Dressing
2 cups Ranch dressing or make your own with 1 pkg. Buttermilk Ranch Dressing mix - made according to directions
2 large tomatillos or 4 small ones
1/2 tsp minced garlic
2 TBS fresh lime juice
1 tsp green tabasco or 1 jalapeno pepper - not both
6 green onions
1 small bunch cilantro
3 tsp. sugar
Make your Ranch Dressing or use already made dressing and place in large bowl and set aside. Remove the husks from the tomatillos and wash and cut in quarters. Add the tomatillos to your blender or food processor with the garlic, lime juice, green tabasco or jalapeno pepper (remove the seeds), green onions and cilantro (remove most of the stem). Blend well.
Add the blended mixture to the ranch dressing and mix together. You can add the sugar, although I actually forgot to add the sugar to mine, so if you liked it, you may want to leave out the sugar. (oops!)
Let this rest overnight, the flavors will blend and get hotter, before serving. If your dressing is too thick, you can add a small amount of milk or buttermilk to thin it.