Preheat oven to 325 degrees F.
Brush zucchini with olive oil and season with salt and pepper. Grill over medium heat in a grill pan until tender and marked. Allow to cool and dice.
In a 12-inch cast iron skillet, melt butter over medium-high heat. Add pancetta and cook until crisp. Add garlic and allow to cook until fragrant. Stir in the grilled zucchini, tomatoes, and fresh herbs. Slightly beat egg whites in a large bowl and add to the pan. Turn the heat off, stir in the Swiss cheese and season with coarse salt and 1 teaspoon of black pepper. Place in oven and bake for 25 to 30 minutes or until egg is set. Remove from the oven and serve.
Recipe courtesy of Aaron McCargo, Jr.