Using a Ninja Woodfire Oven:
Install the Accessory Frame in the bottom level of the unit. Place the Pizza Stone on the Accessory Frame, then place a 10-inch round pan on the stone. Pull open the smoke chamber. While holding the smoke box open, use the pellet scoop to pour pellets into the smoke box until filled to the top. Close the box.
Turn left-hand dial to select SPECIALTY ROAST. Press WOODFIRE FLAVOR. Set STAGE 1 temperature to 500°F, and set time to 20 minutes. Push the right-hand dial to set STAGE 2, then set temperature to 350°F, and set time to 22 minutes. Select START/STOP to begin preheating (preheating will take approx. 20 minutes).
In a large bowl, toss the linguica, potatoes, peppers, onions, garlic, salt, and oil until evenly combined.
When unit is preheated and ADD FOOD and PRS STRT is displayed, open door and place the linguica mixture in the preheated pan. Close door, select START/STOP to begin cooking. Throughout the STAGE 1 cooking cycle, stir the mixture frequently to ensure even cooking.
In a medium bowl, whisk together the eggs, heavy cream, Parmesan, salt, and pepper until smooth.
When STAGE 2 cooking begins, open door, and pour the egg mixture into the pan, evenly covering the linguica and vegetables. Close door to continue cooking.
When cooking is complete, the frittata will be set in the middle and just beginning to brown. Remove pan from oven, slice frittata and serve with Manchego arugula salad.