Season chicken pieces with salt, pepper, and Italian seasoning. Heat 2 tablespoons olive oil in a large skillet over medium-high heat. Add chicken and cook for 5-6 minutes until golden brown and cooked through. Remove chicken from skillet and set aside.

In the same skillet, add remaining 1 tablespoon olive oil. Add gnocchi and cook for 3-4 minutes, stirring occasionally, until golden and slightly crispy on the edges.

Add minced garlic to the skillet with gnocchi and cook for 30 seconds until fragrant. Add halved cherry tomatoes and cook for 2-3 minutes until they begin to soften and release their juices.

Return cooked chicken to the skillet with the gnocchi and tomatoes. Toss everything together and cook for 1-2 minutes to heat through.

Remove skillet from heat. Add fresh mozzarella cubes and torn basil leaves, stirring gently to combine. The residual heat will begin to melt the cheese.

Serve immediately while hot, garnished with additional fresh basil leaves if desired. The mozzarella should be soft and slightly melted throughout the dish.