I found this over at Favorite Family Recipes and have really enjoyed it. It is so simple, fast and yummy.
1 1/2 lbs. chicken breasts, cubed
1/4 c. red wine vinegar
2 t. sugar
1 t. salt
1 t. black pepper
4 cloves garlic
1 T. fresh cilantro, chopped
Toppings (cheese, lettuce, tomatoes, avocado, sour cream, salsa, etc.)
* Saute chicken in skillet, with a little olive oil, until chicken becomes white. In small bowl, combine vinegar, juice from lime, sugar, salt, pepper, garlic and cilantro. Add to chicken. Let simmer another 15-20 minutes. Put in tortillas and top with your favorite toppings.