Preheat oven to 350 degrees. Cook onion in butter until tender. Stir in flour, then bouillon; cook and stir till bouillon dissolves. Remove from heat and stir in sour cream. In large bowl, combine 1 cup of sauce, chicken, 1 cup of cheese (1/2 of each), and picante' sauce; mix well. Dip each tortilla in remaining sauce and fill with mixture. Roll up and arrange in baking pan. Spoon over remaining sauce, and sprinkle remaining cheese.
Bake for 25 minutes or until bubbly.
Shortcut: Use canned pre-cooked chicken breast.
Healthy Tip: Use chicken breast, whole wheat flour and tortillas, reduced fat butter, reduced fat or fat free butter and cheeses.
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