Preheat your oven to 400°F and line a rimmed baking sheet with parchment paper.
Clean the portobello mushrooms with a damp cloth, remove the stems, and use a spoon to gently scrape out the dark gills.
Brush the outside of the mushroom caps with the extra virgin olive oil and place them gill-side up on the prepared baking sheet.
In a medium skillet over medium-high heat, brown the ground turkey while breaking it into small crumbles with a spatula.
Season the turkey with sea salt, black pepper, garlic powder, and dried oregano, cooking until no longer pink.
Add the baby spinach to the skillet and stir for 1 minute until just wilted, then remove the pan from the heat.
Divide the turkey and spinach mixture evenly between the two mushroom caps, pressing down slightly to pack the filling.
Crumble the goat cheese over the top of each stuffed mushroom.
Bake for 15 to 18 minutes until the mushrooms are tender and the goat cheese is softened and slightly golden.
Garnish with freshly chopped parsley and serve immediately.