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1
Preheat oven to 400F Coat a 9-by-13-inch (or similar 3-quart) baking dish with cooking spray.
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2
Heat 2 teaspoons oil in a large nonstick skillet over medium heat.
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3
Sprinkle chicken with 1/2 teaspoon salt.
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4
Add half the chicken to the pan and cook until browned on both sides and just cooked through, 8 to 10 minutes total.
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5
Transfer to the prepared baking dish.
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6
Repeat with the remaining chicken.
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7
Add the remaining 1 teaspoon oil and onion to the pan.
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8
Cook, stirring often, until softened and light brown, 4 to 5 minutes.
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9
Add curry powder, ginger, pepper and the remaining 1/4 teaspoon salt; cook for 1 minute.
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10
Sprinkle with flour and stir to coat.
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11
Add broth and milk.
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12
Bring to a simmer, stirring constantly, until thickened, about 2 minutes.
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13
Remove from the heat and stir in peas, mayonnaise and lemon juice (or vinegar).
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14
Pour the sauce over the chicken.
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15
Wash and dry the pan.
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16
Melt butter in the pan over medium heat.
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17
Remove from the heat and stir in bread cubes.
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18
Toss to coat.
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19
Arrange the bread on top of the casserole.
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20
Bake the casserole until it is bubbling and the croutons are golden brown, 35 to 40 minutes.
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21
Let stand for 10 minutes before serving.
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22
TIPS & NOTES:.
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23
Make Ahead Tip: Prepare through Step 4; cover and refrigerate for up to 1 day or freeze for up to 1 month (defrost in the refrigerator for 2 days before baking).
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24
Let stand at room temperature for 30 minutes, then bake at 400F for about 1 hour.