Saute broccoli, bell peppers and onion in a cast iron skillet or frying pan in about a teaspoon of oil. (I saute each veggie separately as I like them cooked to different degrees. I cook my broccoli until the edges are just browned, pepper just slightly, so they still have some bite, about 1 -2 minutes, and onion until slightly browned.
Place vegetables into the crust.
Beat together the eggs, milk, and salt in a bowl.
Pour egg mixture over veggies.
Bake 25-30 minutes, until an inserted knife comes out clean.