Heat oven to 375°F. Lightly spray 16 mini muffin cups with CRISCO® Original No-Stick Cooking Spray. In 12-inch nonstick skillet, heat oil over medium heat. Add chicken and onions; cook 3 minutes, stirring frequently. Reduce heat to medium-low; stir in marmalade, soy sauce, sherry, garlic powder and red pepper flakes. Simmer uncovered about 5 minutes, stirring occasionally, until sauce is thickened and chicken is no longer pink in center. Remove from heat.