In medium bowl, combine flour and sesame seeds; set aside.

In small bowl, combine mustard and honey. Brush both sides of chicken breasts with mustard mixture; coat well with sesame seed mixture.

Heat olive oil in large skillet; cook chicken over medium heat 4 to 5 minutes each side or until coating is deep golden brown and chicken is no longer pink inside.

Meanwhile, prepare couscous as package directs, except add zucchini and lemon juice after stirring couscous in to boiling liquid.