1. Preheat oven to 400 degrees. In a medium pot, melt 1/4 cup canola oil over medium. Add onion and garlic; cook until slightly softened but not browned, about 7 minutes. Whisk in flour and continue to whisk 1 minute. Slowly add milk and chicken broth, whisking constantly until mixture is smooth. Cook, stirring frequently, until sauce comes to a simmer. Stir in curry powder and season to taste with pepper. Add broccoli and sweet pepper and cook just until beginning to soften, 5 minutes. Stir in cooked turkey. Transfer mixture to an 8-inch square baking dish.
2. In a small bowl, toss bread with remaining 2 tablespoons canola oil until coated. Top turkey mixture with bread and bake until sauce is bubbling and bread is golden brown, about 15 minutes.