Combine orange juice and marjoram in shallow dish. Dip each breast in orange juice mixtures and place in slow cooker. Pour remaining sauce over chicken.
Cover, cook on low 7 - 9 hour or high 3 1/2 to 4 hours.
Remove chicken from slow cooker turn cooker to high and cover.
Combine wter and cornstarthc. Stir into liquid in slow cooker. Place cover slightly ajar on cooker. Cook until sauce is thick and bubbly, approximately 14 to 20 minutes. Serve over chicken.
Variation: to increase spice in dish, add 1/2 to 1 teaspoon Worchestershire sauce to orange juice.
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