In a gallon size zip-top bag, combine chicken tenderloins, pesto, and lemon juice. Knead bag to combine ingredients. Add mozzarella cheese to a quart size zip-top bag and place both bags into another gallon size zip-top bag. Label and freeze.
When ready to cook, thaw in refrigerator overnight.
Preheat oven to 375℉. Place chicken in a 13x9-inch baking dish and cover with aluminum foil. Bake 25-30 minutes.
Remove foil and sprinkle cheese over top of chicken. Bake another 5 minutes. Turn broiler to high and broil 1-2 minutes until cheese browns a bit.
Serve with rice or over pasta with extra pesto, if desired.