Cook pasta per package instruction. Steam yellow beans for few minutes – You don’t have to do it when you use frozen beans. In a pan, heat a teaspoon of oil and fry cubed onion and garlic stirring all the time.
Add the ground chicken and cook for few minutes. Turn off heat.
Arrange pasta, yellow beans and peeled tomatoes in a pan, add grated mozzarella cheese and herbs, salt and pepper. Mix all ingredients, cover the pan and turn on the heat. Let the casserole simmer for 15 minutes until cheese melts.