Fresh eggs and vegetables from the market make a delicious quiche.  Quiche is best served at room temperature so it is perfect to make ahead and take on a picnic.

This crustless quiche recipe from The Kitchn is gluten-free and very versatile in using whatever vegetables are on hand.
Fresh, farm-raised eggs are available from Raccoon Forks Farm or Remnant Hills Farm at the market, and 11 vendors sell all varieties of vegetables, from broccoli to zucchini. has a section on quiche without crust (and several more sections). The Wall Street Journal includes an article on all things quiche, and four recipes to try:
Make America Quiche Again: Recipes That Bring Everyone to the Table