In a large pot or deep skillet, heat the olive oil over medium-high heat. Season the chicken breasts with Italian seasoning, salt, and pepper.
Add the chicken to the pot and sear for about 4-5 minutes on each side until golden brown. Remove the chicken from the pot and set aside.
In the same pot, add the minced garlic and sauté until fragrant, about 30 seconds.
Add the cherry tomatoes and cook until they start to soften, about 3-4 minutes.
Pour in the heavy cream and bring to a gentle simmer, stirring to combine.
Stir in the grated Parmesan cheese and let it melt into the sauce, creating a creamy consistency.
Add the fresh spinach to the pot and stir until wilted.
Return the seared chicken breasts to the pot, spooning the creamy sauce over them. Cover and let everything cook together for an additional 5-7 minutes, until the chicken is cooked through and the sauce has thickened slightly.
Taste and adjust seasoning if necessary.
Notes
Serve with garlic bread or over pasta for a complete meal.