Pour the water into the Instant Pot.
Grease a baking dish with cooking spray.
Combine the diced tomatoes, green onions, and spinach, in it.
Beat the eggs along with the milk, salt, and pepper.
Pour this mixture over the spinach and tomatoes.
Sprinkle with parmesan cheese and top with tomato slices.
Place the baking dish on the rack and close the lid.
Cook on HIGH for 20 minutes.
Wait 10 minutes before releasing the pressure quickly.
Serve and enjoy! Per Serving (Calories 178 | Total Fats 11.2g | Net Carbs: 3.8g | Protein 15.3g |Fiber: 1.2g)