Zucchini and Spinach Frittata

Prep time : 15 minutes    Cook tie : 30 minutes      Serves  4

2                tablespoons  olive oil
1                small red onion , finely chopped
2                garlic cloves , finely chopped
2                medium-size zucchini , halved length-wise  and thinly sliced
1               package (10 ounces) frozen spinach  , thawed and squeeze dry
1/4            cup chopped fresh basil
1/2            teaspoon salt
1/4            teaspoon black pepper
6               eggs , lightly beaten
2/3            cup grated  Parmesan cheese
1               tablespoon  butter or margarine

1 .       In a large  nonstick ovenproof  skillet  over moderate heat  , heat oil 1 minute . Add onion  and garlic  and cook , stirring occasionally  , until soft --- about 5 minutes .
2 .      Add zucchini  and cook  , stirring frequently  until crisp tender  --- about 3 minutes  . Add spinach , basil , salt and pepper  and cook until  spinach  is tender and dry  --- about 5 minutes .
3 .        In a large bowl  , whisk together eggs and Parmesan cheese . Add vegetable mixture  and stir until  well combined .
4 .        Preheat  the broiler  ; Wipe  the skillet  clean  , set over moderate heat , add butter  and heat  until bubbly. Pour in egg mixture  and immediately reduce heat  to as low  as possible . Cook without stirring  until the bottom  and sides  are set , but the top is runny  ---about 12 minutes .
5 .        Transfer  to the broiler  , set 6 inches  from the heat  and broil  until the top  is just set  --- about 2 minutes . Loosen  the  frittata  with a small  metal spatula  and slide  it onto a large platter  . Cut  into 4 wedges  and serve  either hot or at room temperature .

Broccoli Frittata :
Prepare as directed  , substituting  4 cups broccoli  florets  for zucchini  and spinach . Blanch broccoli  for 2 minutes  before coarsely  chopping  and sautéing  in olive oil --- make 4 servings .

Pepper Frittata :
Prepare as directed , substituting  2 cored  seeded  and diced  medium-size sweet pepper a (1 red  and 1 green)  for zucchini  and spinach .  Makes 4 servings