Preheat broiler. On a broiler rack place bread slices; broil 3 to 4 inches from heat until brown, about 1 minute per side; place on a shallow pan; set aside. Cut sausage in 1/2-inch thick slices. In a nonstick skillet over medium-high heat cook sausages until golden, stirring occasionally, 3 to 4 minutes.

Add mushrooms; cook, stirring occasionally, until mushrooms are tender and most of the liquid evaporates, about 5 minutes. Stir in cherry tomatoes and green onions; cook and stir until hot, about 1 minute. Divide mixture evenly over toasted bread; top with cheese, trimming strips to fit. Broil 3 to 4 inches from heat until cheese melts, about 1 minute.