In a mixing bowl, combine honey, black pepper, and olive oil. Add chicken breasts and coat well. Marinate for at least 15 minutes.

In a pot, bring salted water to a boil. Add penne pasta and cook according to package instructions until al dente. Drain and set aside.

Heat a grill pan over medium-high heat. Grill marinated chicken for about 6-7 minutes on each side until cooked through. Remove and let rest before slicing.

In the same pot used for pasta, add heavy cream and bring to a simmer. Stir in parmesan cheese and spinach until cheese is melted and spinach is wilted. Add cooked pasta and mix well.

Spread butter on the outside of ciabatta slices. Layer pasta mixture, sliced grilled chicken, and mozzarella cheese between two slices. Press in a panini press until golden brown and cheese is melted.

Slice the panini in half and serve hot with a side salad or chips.