This is an exquisite omelet filled with fresh baby spinach and tomatoes and with just enough feta cheese to make it rich but not too much to burden it with a lot of saturated fat.
In a small bowl, whisk the eggs, kefir, salt and pepper, with a fork.
Place a medium non-stick skillet on high heat.
When hot, place the smart balance in the skillet, let it melt, and immediately pour the eggs into the skillet (it should sizzle).
Place the spinach, then the tomatoes and feta onto of the eggs and continue to cook as is.
As the eggs start to set around the edges, use a rubber spatula to lift the edges all around, and continue to do so until the eggs are no longer loose.
When the eggs start to set, using the rubber spatula, fold one half of the omelet over the other and cook until ready (no more than 3 or 4 minutes total)