Finely chop the onion and garlic.
Cut the chicken breast into bite-sized pieces.
Add a small amount of olive oil to a pan and sauté the garlic.
Add the onion and cook until it becomes translucent.
Add the chicken breast and cook until done.
Add canned tomatoes and water, then simmer over medium-low heat.
Season with pepper, basil, and other spices to taste.
Boil the spaghetti noodles and drain them in a sieve.
Add the cooked noodles to the sauce and mix well.
Plate and serve.