You can grill the chicken in a pan or heat it up in the microwave.
Add a spoonful of salt to boiling water and cook the pasta until al dente.
Add olive oil to a pan and gently sauté garlic over low heat to bring out its aroma.
Add onion and tomatoes, stir-fry, then add two ladles of pasta water with chicken stock.
Once it comes to a boil, add fresh cream and grilled chicken breast, mixing well to combine.
When bubbles start forming, add the pasta and mix evenly; add more pasta water if needed.
Plate and decorate.