05Reduce heat to medium and add remaining oil to skillet.06Add shallots and crushed red pepper.07Cook, stirring, for about 2 minutes.08Remove from heat.09In a small bowl, whisk broth, grapefruit juice, half of the mint and the flour.10Add to skillet.11Cook, whisking, until slightly thickened, about 3 minutes.12Return chicken and juices to skillet; reduce heat to low.13Simmer until chicken is cooked through, about 4 minutes.14Transfer chicken to a warmed platter.15Season sauce with salt and pepper and spoon over chicken.16Garnish with the remaining mint.