Heat olive oil in a large skillet over medium-high heat.
Season the chicken thighs with salt and pepper, and place them skin-side down in the skillet.
Sear the chicken for 5-7 minutes until golden and crispy.
Flip the chicken and cook the other side for an additional 5 minutes.
Remove the chicken from the skillet and set aside.
Add chopped onions and garlic to the skillet, sauté until translucent.
Add sliced mushrooms and bell peppers to the skillet, cooking for 3-5 minutes.
Stir in diced tomatoes, chicken broth, oregano, and smoked paprika.
Return the chicken to the skillet, skin-side up, and simmer on low for 30 minutes.
Adjust seasoning with salt and pepper to taste, sprinkle with fresh parsley before serving.