Boil a pot of salted water and cook the fettuccine according to package instructions until al dente. Drain and set aside, reserving about ½ cup of pasta water.
While the pasta is cooking, season both sides of the chicken breasts with salt, pepper, dried basil, and oregano.
In a large skillet, heat the olive oil over medium-high heat. Add the chicken breasts and cook for 6-7 minutes on each side or until they are golden brown and cooked through (internal temperature of 165°F). Remove from the skillet and set aside to rest.
In the same skillet, add the minced garlic and sauté for 30 seconds until fragrant. Then add the cherry tomatoes and cook for 2-3 minutes until softened. Add the fresh spinach and stir until wilted.
Slice the cooked chicken into strips and return it to the skillet with the vegetables. Add the drained pasta to the skillet, stirring to combine. If the mixture seems dry, gradually add reserved pasta water until it reaches your desired consistency.
Sprinkle the shredded mozzarella cheese over the pasta, stirring gently until melted and evenly distributed.
Plate the cheesy chicken mozzarella pasta, garnishing with fresh basil leaves for a pop of color and flavor.
Notes
For added flavor, you can use fresh herbs instead of dried.