Ultimate Comfort: My Grandmother's Sear Stuffed Chicken with Spinach & Peppers

Ingredients

• 2 cups fresh spinach, chopped
• 1 cup red bell pepper, diced
• 1/2 cup cream cheese, softened
• 1/2 cup shredded mozzarella cheese
• 1/4 cup grated Parmesan cheese
• 1 clove garlic, minced
• 1 teaspoon olive oil
• Salt and pepper, to taste
• 4 boneless, skinless chicken breasts (about 6 oz each)
• 2 tablespoons olive oil, divided
• 1 teaspoon Italian seasoning