Step 1

Heat oven to 350ºF.

Step 2

Heat oil in large nonstick skillet on medium heat. Add onions; cook and stir 2 min. Stir in mushrooms; cook 3 to 5 min. or until evenly browned, stirring occasionally.

Step 3

Combine rice, broth, sour cream and 1-1/2 cups cheese in large bowl. Add mushroom mixture; mix well.

Step 4

Spoon rice mixture into 9-inch-square baking dish sprayed with cooking spray; top with beans and remaining cheese. Cover.

Step 5

Bake 35 to 40 min. or until casserole is heated through and broth is absorbed, uncovering for the last 5 min.