Cook orzo according to package directions; drain and transfer to bowl; stir in lemon zest.
Meanwhile spray skillet with Pam and set over medium high heat. Stir in mushrooms and 1/4 teaspoon salt. Cook; stirring occasionally until mushrooms are browned and liquid is evaporated (5-10 minutes). Add to orzo; toss.
Meanwhile sprinkle lamb chops with 1/4 teaspoons salt and the pepper.spray skillet with Pam and set over medium high heat and add lamp chops turning once (8-15 minutes).