For Chicken: Preheat oven to 375° and line a large baking sheet with a non-stick mat or foil. Soak skewers in water to prevent burning when cooked.
Cut chicken breast into 1-inch cubes. Rub chicken with salt, cumin, paprika, pepper, garlic, vinegar and oil. Allow to stand for 20-30 minutes.
Skewer 4 pieces of chicken breast per stick. Fold any thin pieces over onto the skewer to make sure meat is tight and even throughout. Arrange on baking sheet and bake for 15 minutes. Flip skewers and raise oven temperature to 425° to cook for 10 more minutes. Remove from oven.
For sauce: While chicken is baking, combine cilantro, jalapeños, garlic, greek yogurt, lime juice, and vinegar in a blender, food processor, or cup with immersion blender. Blend on high speed until smooth. With motor running, blend in olive oil. Season to taste with salt and pepper. Makes about 1 1/4 cups.
Serve warm skewers with sauce. Great for a crowd or throughout the week as meal prep.