Topping:
Place the water in a medium sauce pan over high heat.
When the water boils add the sweet potatoes.
Cook for about 15 minutes until soft.
Remove and let cool slightly.
Place in a bowl with the butter and whip using an electric mixer.
Add the buttermilk, salt and pepper and whip for another minute.
Set aside.
Filling:
Preheat the oven to 325°F.
Place the olive oil in a large skillet over medium high heat.
Add the garlic and onions and cook for 4 minutes until the onions begin to soften. Stir frequently.
Add the rosemary, celery and carrots.
Cook for about 7 minutes until the carrots are slightly tender. Stir frequently.
Add the salt and pepper and then sprinkle the flour (or garbanzo flour) over the vegetables.
Continue to cook, stirring frequently, for about 1 minute.
Add the milk slowly, while stirring continuously, until the mixture is thickened.
Ad the cubed salmon to the sauce and fold in gently.
Cook for 2 minutes.
To assemble:
Divide the pie filling between two oven proof dishes.
Top with the mashed sweet potatoes.
Place the pie in the oven and cook for about 10 minutes until the top is slightly browned.
Serve.
