In a ziplock bag combine chili powder, oregano, salt, cumin, garlic, lime juice and a little oil. Seal bag and smoosh to combine flavours. Add your chicken and smoosh a little more. Refrigerate for a minimum 15 minutes or longer if you have time.
Put your onions and peppers in a bowl. Pour on a little oil and season with salt, pepper and a little cumin.
Take chicken out of marinade and drain. Put on greased BBQ and grill approximately 6-7 minutes per side on med-high until cooked through and juices run clear. Remove from heat and let rest under cover.
Meanwhile on a preheated BBQ grill topper or stove top grill pan add some oil and your onion/pepper mix. Give it a little more s&p and saute for about 4-5 minutes or until veggies tender crisp. Set aside in a bowl.
Get all your fixin’s ready, heat up your flour tortillas (10 seconds in microwave, or toss on grill), slice your chicken, grab some peppers/onions and you are ready to assemble your chicken fajita.
Fixins: shredded lettuce, diced tomato, salsa, guacamole, sour cream, hot peppers (banana or jalapeno), shredded cheese, chopped cilantro