Blend all the ingredients for the cilantro-lime sauce till smooth. Set aside.

In a large bowl, mix the taco seasoning and ground turkey together. Form into 4 patties, set aside.

In a large skillet, heat 1 tablespoon of olive oil over medium heat. Once the oil starts to shimmer, add in the onions, stirring occasionally. Cook till onions become translucent about 6-8 min. Transfer onions to a small dish, wipe the pan out, and return to stovetop. 

Add 1 tbs of olive oil to the skillet. Once it starts to shimmer, add turkey patties. Cook for 3-4 minutes, flip, add pepper jack cheese, cook for another 3-4 minutes, or until the meat is cooked all the way through. 

Transfer the patties to the buns—top with tomatoes, onions, lettuce, avocado, and cilantro lime sauce.