Step 1

Place potatoes in a large saucepan; cover with water. Bring to a boil. Reduce heat; cover and simmer for 20-25 minutes or until very tender; drain.

Step 2

Transfer to a large bowl. Add sour cream and broth; beat on low speed until smooth; set aside. In a large skillet, cook the sausage, mushrooms and onion until vegetables are tender. Add garlic; cook 1 minute longer.

Step 3

Spread half of the potato mixture into a 9x5-in. loaf pan coated with cooking spray. Top with sausage mixture and remaining potatoes. Sprinkle with the cheese, parsley and oregano.

Step 4

Bake, uncovered, at 350° for 10-15 minutes or until cheese is melted.