Also, adobo sauce tastes delicious with shrimp or fish so you should have no problem using up the sauce. If you do not want to make the adobo sauce, buy a 7 oz can of chipotle chilis in adobo sauce and purée until smooth. Try to add as much adobo sauce into your purée by scraping it off the chilis. You may not need all the chipotles. This sauce may be spicier and smokier than if you made the adobo from scratch.
Adobo sauce recipe is from Truly Mexican by Roberto Santibañez
Pour the yogurt adobo sauce into the bowl with the chicken and thoroughly mix until the chicken is evenly coated with the marinade. Cover the bowl with plastic wrap and marinate for two hours or up to 6 hours.
When the skewers are sufficiently soaked, thread the chicken pieces on the skewers. I fit 6 pieces of chicken on each skewer. Be careful not to pack the chicken in too tight and therefore will take longer to cook. Set the chicken kebabs on a tray when done.
When the coals and grill grate are nice and hot, add some oil to a wad of paper towels. Hold onto your paper towel wad with long barbecue tongs and rub oil over the hot grill grate.
Place the kebabs on a diagonal over the grate directly over the heat source. Grill the kebabs for 3 minutes then turn them over to the other side. Grill that side for 3 minutes. Continue cooking the chicken kebabs turning them over every 2 minutes until they are done, the internal temperature is 165°F (74°C). You might need to sacrifice one piece of chicken and cut it open to see if it is done. The total cooking time should be around 8 – 12 minutes depending on how hot your grill is.
If the chicken kebabs are getting too charred, move them over to the side of the grill not directly over the coals or heat source.
When done, place the kebabs on a tray and cover with foil to rest for 5 minutes.
Heat a heavy-duty skillet or griddle to medium-low heat. (I used a non-stick electric griddle set at 325 - 350°F, (173°-176°C). It was great to fit all the chilies on the griddle in one fell swoop.) Toast the chilies turning them over until they slightly change color, soften and become fragrant About one minute. While you are toasting the chilies, press down on them to get as much of the surface area touching the hot surface.
Add ¾ cup of fresh water to the processor with the chilies, the garlic, apple cider vinegar, kosher salt, sugar, and cumin. Blend until smooth, about 3 minutes. Add more water to thin the purée as needed. Taste and adjust the seasoning. If you want a smooth and silky purée, press the adobo through a fine mesh strainer fitted over a bowl.
Makes 1 ½ cups (375 ml) of adobo sauce
You want to use plain yogurt, not Greek yogurt for the marinade. It is best if the marinade is not too thick. If Greek yogurt is all you have then thin it out with some milk or buttermilk. You can also substitute buttermilk for the yogurt.
There is enough marinade for 3 pounds of chicken if you need to cook for a larger crowd. There is no need to make more marinade for the additional pound.