Baked Chicken Breasts With Honey Mustard Sauce

• 3 chicken breasts
• 1 boullion cube in
• 600 ml chicken broth
• 240 ml yogurt
• 120 ml honey
• 120 gr wild rice
• 120 ml water (hot)
• 80 ml dijon mustard
• 28 gr brown sugar
• 16 ml soy sauce