Preheat your oven to 400 degrees Fahrenheit.
Start by rinsing your chicken breasts and lightly seasoning them with sea salt + black pepper. Set aside.
Over medium-high heat, melt 2 Tbsps of unsalted butter in a skillet.
Once heated, add your chicken breasts and sear on both sides until golden brown, about 2-3 minutes per side. Remove chicken breasts from skillet and set aside onto a plate for them to "rest" a bit.
In the same skillet, melt the remaining 1 Tbsp of butter and add minced garlic sauté frequently about 1 minute until translucent and fragrant. **NOTE: It's OK if there are little bits in your skillet from frying the chicken. That adds nice flavor. **
Add in the tuscan seasonings and stir together until well combined. Add the grated Parmesan cheese and continue to simmer for another 2-3 minutes.
Add the kale and cook within the sauce until it has wilted. Next, return the chicken breasts back to the skillet and spoon some of the sauce from the side on top of the chicken a few times.
Finally, place the skillet (oven-friendly of course!) in the oven and bake for about 20 minutes until chicken looks fully cooked through.
Once done, remove your chicken from the oven and serve immediately with your favorite sides such as rice, potatoes (baked or mashed), veggies, etc.