Place sliced onion in bottom of crock-pot. Add chicken -- you can either use a whole chicken or chop it up in pieces. Stir together tomato paste (as indicated, I used 1 can of "regular" tomato paste and 1 can with garlic), creole seasoning (I used Konriko brand), pepper, garlic, herbs, and 1/4 cup of wine. I went against "tradition" and used a red wine. I like the way reds blend with tomato sauces. In this case, I used a light Chianti. Pour over chicken. Pour remaining wine over chicken as well. Cover and cook on LOW for 7 to 9 hours (HIGH 3 to 4 hours). Serve chicken over hot buttered spaghetti, vermicelli, fettucini, or other pasta.