Melt the butter in a large sauce pan over medium heat. Cook the celery and onion in the butter, stirring frequently, for 5 minutes. Add the garlic and cook another 2 minutes. Stir in the flour, curry powder, and ..
Heat oil over medium-high heat in a large, deep saute pan until shimmering. Add sweet potatoes, then onion; saute, stirring very little at first, then more frequently, until vegetables start to turn golden brown, 7 to 8 minutes.