1. 1. Cook penne pasta according to package instructions. Drain and set aside.

2. 2. In a pan, melt butter over medium heat.

3. 3. Add cherry tomatoes to the pan and cook until they start to soften, about 3-4 minutes.

4. 4. Stir in low-fat sour cream and mix well.

5. 5. Add the cooked penne pasta to the pan and toss to coat the pasta in the creamy sauce.

6. 6. Serve hot and enjoy!