Preheat oven to 450 degrees F.
Clean, de-stem and remove seeds from all Anaheim, Poblano and Jalapeno peppers. Rub with 1 tbsp olive oil and place on tin foil lined baking sheet.
Place baking sheet on top rack of oven for 10 minutes, flip, and cook for additional 5 minutes until peppers are blistering.
Remove from oven and cover tightly with tin foil for 15 minutes to steam.
Remove tin foil and remove skin of peppers as best you can. Set aside.
In a pan over medium heat, heat 1 tbsp olive oil. Add chopped yellow onion, 1 tsp salt, pepper and cook 5 minutes until soft.
Add chopped garlic and cook for additional 3 minutes until fragrant. Do not brown. Remove from heat and set aside.
Blend 3 Anaheim peppers, 1 Poblano pepper, Jalapeno, onion/garlic mixture, cumin, cilantro and chicken broth in food processor until smooth. Add additional salt and pepper to taste. Set aside.