Preheat your oven to 375°F and lightly grease a small oven-safe baking dish.
Roughly chop the fresh baby spinach and sauté in a pan over medium heat until just wilted.
Transfer the wilted spinach to a clean kitchen towel and squeeze firmly to remove all excess moisture.
In a medium mixing bowl, whisk together the part-skim ricotta, egg whites, grated parmesan, garlic powder, dried oregano, sea salt, and black pepper.
Gently fold the squeezed spinach into the ricotta mixture until evenly distributed.
Pour the mixture into the prepared baking dish and bake for 25 to 30 minutes, or until the center is set and the top is lightly browned.
While the ricotta is baking, use a vegetable peeler to slice the zucchini into long, thin ribbons.
Heat the extra virgin olive oil in a skillet over medium heat and sauté the zucchini ribbons for 2 to 3 minutes until tender.
In a small saucepan, warm the marinara sauce over low heat until simmering.
To serve, place a bed of zucchini ribbons on a plate, top with a portion of the baked ricotta, and finish with a generous pour of warm marinara sauce.