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1
Brown chicken: Pat chicken dry with paper towels and season with salt and pepper. Heat oil in 12-inch skillet over medium-high heat until just smoking. Brown chicken lightly on both sides, about 4 minutes total.
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2
Assemble glaze: Drain pineapple chunks, reserving 1/2 cup juice. Whisk reserved pineapple juice, honey, soy sauce, curry powder, and cayenne together.
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3
Simmer chicken in glaze: Add pineapple juice mixture and pineapple chunks to skillet and bring to simmer. Reduce heat to low, cover, and cook until chicken is no longer pink in center and thickest part registers 160 degrees F on instant-read thermometer, 8 to 12 minutes.
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4
Rest chicken and simmer glaze: Transfer chicken to serving platter, cover with foil, and let rest for 5 to 10 minutes. Return glaze to simmer and cook, uncovered, until thickened slightly and glossy, about 8 minutes.
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5
Finish glaze: Add accumulated chicken juices to glaze. Whisk cornstarch and vinegar together until smooth, then whisk into glaze. Continue to simmer glaze until thick and syrupy, about 1 minute. Season with salt and pepper to taste. Pour glaze over chicken, sprinkle with toasted almonds, and serve.
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6
Note: To toast the 1/4 cup almonds, put them in a dry skillet over medium heat. Shake the skillet occasionally to prevent scorching and toast until they are lightly browned and fragrant, 3 to 8 minutes.
