Whisk together the eggs, parmesan, salt, pepper, chives, the ¼ cup of dill, and ½ cup of the sour cream.
Add 1 tablespoon of the butter to a 12-inch skillet over medium heat, add the egg mixture, and then let it cook for about 5 minutes.
Add the remaining butter, transfer the skillet to the oven, and then let it bake for about 10 minutes.
Add the salmon, seasoning, onion, tomatoes, capers, remaining dill, and remaining sour cream.
Notes
Be sure to use a nonstick skillet, and sprinkle the chopped butter evenly over the egg mixture. You can quarter or halve the frittata for a light snack!