Creamy Tuscan Chicken Skillet

Name: Creamy Tuscan Chicken Skillet
Prep time: 5 min
Cook time: 15 min
Total time: 20 min
Cuisine: Italian
Ingredients: 1 1/2 pounds chicken breast (sliced thin); 3 ounces fresh baby spinach leaves; 8 ounces baby bella mushrooms (sliced); 1 cup heavy whipping cream; 2/3 cup grated parmesan cheese; 1 15 ounce can diced tomatoes (liquid included); 1/2 cup mascarpone cheese; 3 cloves garlic (minced); 2 tablespoons butter; 2 tablespoons fresh basil (chopped); 1 tablespoon tomato paste; 1 tablespoon olive oil; 1 teaspoon salt (divided); 1/2 teaspoon ground black pepper (divided)