Preheat oven to 300°F (150°C) and spray a (silicone) muffin pan with cooking spray or grease with oil. Place a rack in the center of the oven and add a second rack beneath it. Fill a large baking pan with water and place it in the lower rack to create steam.
Add to a blender eggs, cottage cheese, salt and pepper. Blend until just combined, but do not overmix. As an alternative you can also whisk all ingredients together in a large bowl.
Chop the turkey ham, then add it to the egg mixture along with shredded Gruyère. Use a spatula or fork to combine.
Fill ⅔ of each muffin mold. Sprinkle with more diced ham on top, if you desire.
Bake in the middle rack of the oven for 25 to 30 minutes, or until they have set in the center. Let cool before serving.