Place the slivered almonds in a dry skillet over medium heat, tossing frequently until they are golden brown and fragrant, then set aside.
Cut the chicken breast into bite-sized pieces and season with half of the sea salt and black pepper.
Heat the olive oil in a small saucepan over medium-high heat and sear the chicken until browned on all sides, about 4-5 minutes, then remove chicken from the pan.
In the same pan, add the finely diced onion and minced garlic, sautéing for 2 minutes until translucent.
Add the dry basmati rice to the pan and toast for 1 minute, stirring constantly to coat the grains in the remaining oil.
Pour in the chicken broth and add the dried thyme and remaining salt and pepper.
Bring the liquid to a boil, then reduce heat to low, cover, and simmer for 12-15 minutes until the broth is absorbed.
Return the chicken to the pan for the last 2 minutes of cooking to heat through.
Remove from heat, let sit covered for 5 minutes, then fluff with a fork and stir in the fresh chopped parsley and toasted almonds.