Heat the olive oil in a large skillet over medium heat.
Season the chicken breasts with salt and pepper, then add to the skillet.
Cook the chicken for about 6-7 minutes per side until fully cooked.
Remove the chicken and set aside on a plate.
In the same skillet, add the minced garlic and sauté until fragrant.
Pour in the heavy cream, then add Dijon mustard and thyme, stirring well.
Allow the sauce to simmer for 5-7 minutes, thickening slightly.
Return the chicken to the skillet, coating it with the sauce.
Garnish with chopped parsley and serve hot.