In a large dry pan, add the kielbasa and cook over medium heat until the fat gets rendered out and the kielbasa is cooked and slightly browned. Remove kielbasa with a slotted spoon to a plate, but reserve the rendered oil in the pan.

To the kielbasa oil, add onions, carrots, and green beans. Cook together until crisp tender. Add a little salt and pepper, but use a light hand.

Add back kielbasa and toss together. Squirt in ketchup. Toss for a minute more. Serve over rice. Drizzle with sriracha or any hot sauce if you want a spicy kick. Serve over a bed of rice or quinoa.