I saw that a few weeks ago someone posted their recipe for the Cafe Rio Sweet Barbacoa Pork (greatest stuff ever), so I figured I'd add their dressing to the mix.
1 packet hidden valley ranch mix
1 c mayo
1/2 c milk
1/2 bunch cilantro
2 cloves garlic
juice of 1 lime
1 jalapeno (ribbed and seeded, unless you want it extra spicy)
Use a food processor and blend all the ingredients but hot sauce. Add hot sauce at the end to taste.
In a pinch? Here's another version that cuts your work down for you:
Omit tomatillos and jalapeno, and cut cilantro down to 1/2 c. Add 1/4 c green salsa in its place.