Heat a skillet on medium heat and melt 1 tablespoon of butter in it.
While it's preheating, season the chicken with the spices and salt.
4 chicken breasts, 1 1/2 teaspoons onion powder, 1 teaspoon garlic powder, 1 teaspoon salt, 1 teaspoon oregano, 1/2 teaspoon paprika, 1/2 teaspoon pepper
When the pan is hot, place the seasoned chicken breasts in it and cook for 5-7 minutes on each side until they're cooked through. Remove the chicken from the pan.
Turn the temperature down to medium-low and add the rest of the butter to the skillet. Use a spatula to loosen any bits of stuck on chicken.
Whisk in the bone broth and cream, and bring it to a slow simmer. Let it reduce for about 5 minutes, whisking frequently.
2 cups bone broth, 1/4 cup heavy cream
Whisk the tapioca starch with an equal amount of water. Once the gravy has reduced enough, slowly whisk in the slurry into the gravy.
2 tablespoons tapioca starch
Whisk constantly for a few minutes until the gravy has thickened.
Place the chicken breasts back into the gravy, and cook until they're heated through.
Season with additional salt and pepper to taste and serve immediately.