In a small bowl, mix together cream cheese, mayonnaise, 2 cloves garlic, green onion and pepper; set aside.
In a large skillet, melt butter over medium heat. Add remaining 3 cloves garlic and parsley. Add shrimp; cook for 3 to 4 minutes, or until pink and firm. Do not overcook.
Spread cream cheese mixture evenly over French bread rounds. Top each with 1 shrimp. Garnish with tomato halves and parsley leaves.