The owner of a cafe here in our little town made these, but were very spicy. My sister and I would ask her to make us some, not so hot, so she began calling them "Gringo Chicken Tacos". They were on her menu like this. She is gone now, but we love these tacos.
Cut chicken tenders into bite size pieces. Place in large bowl and add chili powder, cumin and garlic salt. Let set for about 1 hour.
When ready to cook add about 2 T oil in a large skillet. Add tenders and cook until done, usually takes about 10-15 minutes. Remove from skillet and place in dish, cover with foil and put in warm oven. In same skillet, add 1 T butter, onion and bell pepper. Saute until veggies are tender, at the last minute add the jalapeno and cook for 1 minute more.
While cooking veggies, butter both sides of taco size flour tortillas, place tortillas on griddle and warm on both sides. Keep warm until ready to serve. To serve: place chicken, onion and pepper mixture on flour tortilla, add grated cheese, chopped tomatoes, salsa and sour cream is desired, fold over like taco and enjoy.
If you want them to be hotter, just add more jalapeno in the mixture.