Prepare all ingredients: dice the tomatoes, chop the onion, and cook the chicken breast.

In a pan, sauté the chopped onion and diced tomatoes until softened.

Add the cooked chicken breast to the pan and stir well.

Add water and cooked rice to the pan, then simmer on low heat until the mixture thickens.

Add the slice of baby cheese and stir until melted. Adjust the seasoning with salt and pepper.