1/2 of 8 oz. loaf French bread, unsliced
1/3 c. mayonnaise
4 oz. (1 c.) shredded Mozzarella cheese
2 tbsp. Parmesan cheese
2 tbsp. chopped green onion
1 (2.5 oz.) jar sliced mushrooms, drained

Slice bread in half lengthwise.

Combine remaining ingredients. Spread mixture evenly over bread halves. Bake at 375 degrees for 10-12 minutes or until bread is crisp and cheese is melted.