For the fluffiest texture, whisk the eggs longer than you think, aiming for visible bubbles and a lighter color before cooking. If you prefer a dairy free version, replace the heavy cream with unsweetened almond milk, use only olive or avocado oil in the pan, and skip the Parmesan while substituting the feta with a dairy free cheese alternative if desired. Keep the heat at medium or slightly below to prevent the bottom from browning too quickly and to preserve soft, tender curds. This omelette is best fresh but can be cooled completely, stored in an airtight container in the refrigerator for up to 2 days, and reheated gently over low heat in a covered skillet. To keep carbs low, pair with avocado and leafy greens rather than higher carb vegetables, and avoid serving with toast or grain based sides.