Quiche: Gluten free, vegetarian, healthy, delicious, quiche.

While this is amazingly delicious, this one is neither quick nor inexpensive.  Sorry.
Makes enough for a large family, party, or to freeze and eat over time.Cut into pieces:
4 LARGE red onions
3 cups of broccoli
2 cups sweet peppers
3 cups mushroom (optional)
3 cups zucchini (optional)
You may also consider adding a few jalapenos for some extra kick.
You may also want to consider adding jerky, cut up into about quarter size pieces and adding them to the large bowl for mixing.  Just about any kind of jerky can be added.
Lightly saute (it still has to bake and you don't want the vegetables over cooked) in a large frying pan (I prefer cast iron because of how evenly it cooks and the added iron), or sauce pan, on medium low adding 1 table-spoon olive oil to coat the pan before adding the vegetables.

Finely chop all ingredients in a food processor or by hand.  Pour all sauteed and finely chopped vegetables into a large bowl.

Add 14 eggs, one cup plain Greek yogurt, and 10 ounces (by weight) of either smoked gouda or smoked Swiss cheese (you can also mix the two cheeses).

Optional ingredient:
You can add two to four cups of chopped turkey ham.

Mix all ingredients well in a large bowl.  I prefer to use a wooden spoon with a hole in the middle.

Pour ingredients into one or two casserole pans, lightly coated in olive oil.  (You can also put them in pie pans with a crust if you wish; however, I prefer without a crust.  Note: if you use a crust it may no longer be gluten free.)

Bake in a preheated oven at 375 for approximately 50 minutes.  (After about 50 minutes, you can put a clean butter/table knife in the center of the quiche, to the bottom, and if it comes out clean, it's done.)

Alternative, more delicious and yes, less healthy ingredients for the Quiche.
In lieu of chopped turkey ham, you can fry two packages of bacon.  Add the bacon to the food processor for chopping (not blending) or cut into small pieces.
you can also also use one cup of whole milk in lieu of the Greek Yogurt.
Add these ingredients to the large bowl and mix with the other ingredients before baking.