Start by seasoning the halved chicken breasts with 1/2 teaspoon of fine sea salt, 1/4 teaspoon of black pepper, and garlic powder on both sides.
In a large skillet, heat 1 tablespoon of light olive oil over medium-high heat. Add the seasoned chicken breasts and cook for about 5-6 minutes per side until golden brown and cooked through.
In the same skillet, reduce the heat to medium and add the remaining tablespoon of olive oil and unsalted butter. Once melted, add the sliced mushrooms and cook for 4-5 minutes until browned and tender.
Add the chopped sun-dried tomatoes, green onions, and minced garlic. Sauté for an additional 2-3 minutes until fragrant.
Pour in the heavy whipping cream and stir to combine. Allow to simmer, then add the parmesan cheese, stirring until melted and smooth.
Stir in the fresh baby spinach and cook for just a minute until wilted. Return the seared chicken to the skillet, spooning the creamy sauce over the top.
Serve the creamy Tuscan chicken over pasta, rice, or alongside a fresh salad.