Cut the chicken breast and tomatoes into bite-sized pieces.
Slice the garlic thinly.
Boil the spaghetti and drain the water.
Heat olive oil in a pan over medium heat and sauté the garlic.
Add the chicken breast and cook until done.
Add the tomatoes and mix well.
Add the cooked spaghetti, then season with salt and pepper.
Once everything is well mixed, plate and serve.