Slice the kielbasa into small rounds about ¼ inch thick. Dice the onion and bell pepper into small pieces, aiming for sizes between ¼ and ½ inch. In a small bowl, combine the paprika, oregano, garlic powder, salt, and pepper, then set aside.
In a large sauté pan or a 12-inch skillet with a lid, add 1 tablespoon of olive oil and heat it over medium-high. Once hot, add the sliced kielbasa to the pan. Cook the sausage for 5-6 minutes, turning occasionally, until browned on each side. Next, add the diced onions and sauté until they start to brown and soften, which should take about 3-4 minutes.
Now, add the chicken broth, rice, tomato paste, diced bell pepper, and the previously mixed spices (paprika, oregano, garlic powder, salt, and pepper) to the pan. Stir thoroughly until everything is well combined. Bring the mixture to a boil.
Once boiling, cover the pan with a lid and reduce the heat to medium-low to maintain a gentle simmer. Cook covered for 20-23 minutes, or until the rice is tender and most of the liquid has evaporated. It’s acceptable for a little liquid to remain in the pan as long as the rice is tender, but the mixture shouldn’t be runny. Finish by lightly sprinkling with fresh parsley or chopped green onions, then enjoy!