Preheat your oven to 400°F (200°C).
In a small oven-safe skillet, toss the cherry tomatoes with extra virgin olive oil, dried oregano, sea salt, and black pepper.
Place the block of feta cheese in the center of the skillet, surrounding it with the seasoned tomatoes.
Roast in the oven for 15 minutes until the tomatoes are blistered and the feta has softened significantly.
Remove the skillet from the oven and stir in the fresh baby spinach until it is just wilted from the residual heat.
In a small bowl, whisk together the liquid egg whites and the whole egg until well combined.
Pour the egg mixture over the roasted tomatoes, spinach, and feta in the skillet.
Return the skillet to the oven and bake for an additional 10-12 minutes until the eggs are fully set and the edges are slightly golden.
Garnish with freshly chopped basil and serve warm.