Step 1

Preheat oven to 400°. Remove stems from mushrooms; place caps in a greased 15x10x1-in. pan. Finely chop stems; wrap in paper towels and squeeze to remove moisture.

Step 2

In a skillet, heat 1-1/2 tablespoons butter; saute onion and stems over medium-high heat until tender. Stir in lemon juice and seasonings; cook until juices are almost evaporated. Cool slightly.

Step 3

Mix sausage, parsley and onion mixture; spoon into mushroom caps. Mix bread crumbs and cheese; sprinkle over tops. Dot with remaining butter.

Step 4

Bake until sausage is cooked through, 15-20 minutes, basting occasionally with pan juices. If desired, top with green onions.