Combine garlic paste, oregano, Italian seasoning, salt, and pepper in a large bowl; mix until thoroughly incorporated.
Add the chicken thighs to the bowl and rub the paste into the chicken until evenly coated; set aside.
Heat olive oil in a large nonstick skillet or pan over medium-heat.
Remove previously prepared chicken thighs from the bowl and add them to the hot oil. Cook for 5 to 6 minutes, or until chicken begins to brown; turn them over and continue to cook for about 5 more minutes, or until browned.
Remove chicken thighs from skillet and set aside.
Add the onions and garlic to the pan; season with salt and cook for about 3 minutes, or until onions are soft. Stir frequently.
Lower heat to a medium and add the lemon slices and wine, stirring to loosen any browned bits stuck to the bottom; cook for 3 minutes.
Add the chicken broth, return the thighs to the skillet, and bring to a boil; lower heat to a simmer and continue to cook for 5 minutes.
Add the olives and continue simmering for 10 minutes.
Remove from heat and let stand 5 to 7 minutes, or until most of the liquid is absorbed, but not all of it.
Serve chicken and ladle olives and liquid over the chicken thighs.
Notes
This dish pairs wonderfully with crusty bread to soak up the delicious sauce.