In a mixing bowl, combine cream cheese, green onion, lemon juice, and bottled hot-pepper sauce. Gently stir in crabmeat.
Place 1 teaspoon cheese mixture on a piece of Melba toast; top with olive.
Place 15 Melba toasts in a microwave-safe napkin-lined basket or plate. Cover with paper towel. Microcook on 50 percent power (medium) for 30 seconds or until the crab filling and Melba toast are warm. Repeat with remaining. Makes 30 appetizer servings.