Place vegetables in bottom of slow cooker.
Top with chicken, spices and water.
Cook on high for 4 hours, medium for 6 hours or low for 8 hours.
In a small sauce pan, melt butter over medium heat.
Add flour and whisk constantly for about 5 minutes, or until it turns a deep brown color.
Add milk and whisk until thick and bubbly.
Add the thickened sauce to the slow cooker and mix in well until sauce is blended.
Serve with some crusty bread or rolls.