I heat olive oil and butter in the skillet over medium-high until the butter melts and oil shimmers. Then I add the diced onion and cook until softened (about 4 minutes), followed by adding minced garlic for about 30 seconds, and then the sliced smoked sausage, letting it brown lightly for ~2 minutes.
Once the sausage is lightly browned, I stir in chopped broccoli and bell peppers (yellow + red), reduce heat, cover the skillet and let the veggies cook for about 5 minutes. If the skillet seems dry, I add a splash of chicken broth or water to help them steam without sticking.
After the veggies are tender-crisp, I fold in the fully cooked rice, seasoned salt, cracked pepper, garlic powder, onion powder and mix well so flavors are distributed. I then take the skillet off heat, sprinkle grated cheddar cheese on top and stir in, letting the residual heat melt it gently instead of risking it burning.