Preheat your oven to 425°F (220°C) and line a large baking sheet with parchment paper.
In a medium mixing bowl, combine the ground chicken, liquid egg whites, grated parmesan, garlic powder, dried oregano, sea salt, and black pepper until fully incorporated.
Place the chicken mixture onto the prepared baking sheet and press it into a thin, even circle about 1/4 inch thick.
Bake the crust for 15-20 minutes until the edges are golden brown and the surface feels firm to the touch.
Remove the crust from the oven and lightly brush the outer edges with olive oil to help achieve a crispy texture.
Spread the marinara sauce evenly over the crust, leaving a small border for the handle.
Layer on the lite mozzarella cheese, cooked ground beef, chicken breast bites, and fresh spinach.
Return the pizza to the oven for an additional 5-8 minutes until the cheese is melted and the spinach has wilted.
Let the pizza rest for 2-3 minutes before slicing to ensure the crust remains sturdy.