Season the chicken breast evenly on both sides with sea salt, black pepper, and dried oregano.
Heat the olive oil in a medium skillet over medium-high heat.
Place the chicken in the skillet and sear until golden brown and cooked through, approximately 5 to 6 minutes per side.
Remove the chicken from the pan and set it aside on a plate to rest.
In the same skillet, add the minced garlic and dry orzo, stirring constantly for 1 minute to lightly toast the grains.
Pour in the chicken broth and lemon juice, scraping the bottom of the pan to release any browned bits.
Bring the liquid to a gentle simmer, cover, and cook for 8 to 10 minutes until the orzo is tender and most liquid is absorbed.
Stir in the chopped kale during the last 2 minutes of cooking until it is wilted and bright green.
Slice the rested chicken into strips and serve it over the warm lemon-herb orzo and kale mixture.