Creamy Garlic Chicken with Spinach and Bacon

Name: Creamy Garlic Chicken with Spinach and Bacon
Cuisine: European, American, Italian, Mediterranean
Ingredients: 6 chicken thighs, boneless and skin off (or chicken breast); 2 teaspoons olive oil; 2 tablespoons butter; 6 cloves garlic, finely diced; 1 small yellow onion, diced; 1/3 cup chicken broth (or dry white wine); 1/2 cup crispy bacon, chopped; 1 3/4 cups half and half; 3 cups baby spinach leaves; Salt and fresh cracked pepper; 1 teaspoon Italian seasoning; 1/2 cup fresh grated Parmesan cheese; Crushed chili pepper flakes, optional; 1 teaspoon cornstarch (cornflour) mixed with 1 tablespoon of water (optional, if you like a thicker sauce)