12 Old El Paso Taco Shells
1 lg. onion, cut and separated into rings
1 tbsp. butter
3 c. cooked and shredded chicken
1 jar (16 oz.) Old El Paso Taco Sauce, divided usage
1 jar (11 1/4 oz.) Old El Jalapeno Slices, drained, divided usage
3/4 c. diced tomatoes
Shredded lettuce
Shredded Cheddar cheese

Prepare shells according to package directions. In a medium skillet, saute onion and butter until brown. Add chicken, 1/2 cup sauce and 1/4 cup chopped jalapeno slices; heat through. Chop remaining jalapeno slices and combine with tomatoes. Fill each shell with a 1/3 cup chicken mixture. Top with lettuce, tomato-jalapeno mixture, cheese and remaining sauce.