1) Mix the first 6 ingredients well.
2) Fold the cheese and spinach into the egg mixture.
3) Pour into a greased 13X9 glass baking dish.
Bake at 350F for 30-40 minutes until a knife inserted in the middle comes out clean.
Sprinkle additional Monterey jack cheese on top just before serving.
Serve hot.
Tip: Top it with grilled veggies or just a layer of tomatoes for a welcome variation.
This recipe may be mixed a day ahead without spinach and refrigerated, add the spinach just before baking.