Heat some olive oil in a well-seasoned 10-inch cast-iron skillet over medium heat. Add the jalapenos, red peppers, yellow peppers and onions and cook, stirring occasionally, until soft, about 4 minutes.
In a bowl, beat the eggs with the oregano and a pinch of salt and pepper, then pour into the skillet. Stir with a heatproof spatula, letting uncooked egg run under the cooked egg and veggies. Scatter the goat cheese, basil, cilantro and parsley over the top.
Transfer the skillet to the broiler; broil until cooked through, about 3 minutes. Run the spatula around the edge of the frittata to release it from the skillet, then slide the frittata onto a serving plate. Top with avocado slices and cut into servings.
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.