Season the chicken breasts with salt, pepper, and Italian seasoning.
Heat olive oil in a large skillet over medium-high heat.
Add the seasoned chicken breasts to the skillet and sear for about 5-7 minutes per side until golden and cooked through.
Remove the chicken from the skillet and set aside on a plate.
Add cherry tomatoes to the same skillet and cook for 2-3 minutes until they soften.
Pour in chicken broth and heavy cream, stirring to combine and dissolve the thickened bits.
Return the chicken to the skillet, along with any juices on the plate, and let simmer for 5 minutes.
Stir in the chopped spinach until wilted, about 1-2 minutes before serving.