In a large pot, bring salted water to a boil. Add the spaghetti and cook according to the package instructions until al dente. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the chopped onion and minced garlic, sautéing until soft and translucent, about 3 to 4 minutes. Add the sliced mushrooms and cook for an additional 5 minutes until browned.
In a mixing bowl, combine the sautéed vegetables, shredded turkey, frozen peas, drained spaghetti, chicken broth, sour cream, dried thyme, black pepper, sea salt, and smoked paprika. Stir until well-blended.
Pour the mixture into a greased 9x13 inch baking dish, spreading it evenly.
Sprinkle the freshly shredded mozzarella cheese over the top.
Bake in the preheated oven for 25 to 30 minutes, or until the cheese is golden brown and bubbly.
Let the dish sit for 5 to 10 minutes before serving.
Notes
Serve in individual bowls, garnished with parsley or smoked paprika.