1. 1. Cook elbow macaroni according to package instructions. Drain and set aside.

2. 2. In a large skillet, melt butter over medium heat. Add chopped red onion, bell pepper, zucchini, and broccoli florets. Cook until vegetables are tender.

3. 3. Slice the hot dogs into bite-sized pieces and add them to the skillet. Cook until heated through.

4. 4. Add cooked macaroni to the skillet and mix well with the vegetables and hot dogs.

5. 5. Sprinkle shredded cheddar cheese on top and cover the skillet to let the cheese melt.

6. 6. Once the cheese is melted, remove from heat and serve hot.