How to Make It
Preheat broiler to high.
Place bread, cut side up, on a baking sheet. Broil 1 1/2 minutes or until bread is lightly toasted.
Place cauliflower in a steamer basket over simmering water; cover and steam 8 minutes or until very tender. Place stock in a small microwave-safe bowl; microwave at HIGH 30 seconds or until warm. Place cauliflower and stock in a food processor; process until smooth. Add cheese; process until combined.
Spread cauliflower mixture over bread halves; broil 4 minutes or until lightly browned. Cut into 4 pieces; sprinkle with pepper.