Preheat oven to 220C/200C fan-forced. Grease 2 baking trays. Heat oil in a frying pan over medium-high heat. Add onion and bacon. Cook, stirring, for 5 minutes or until onion is softened and bacon golden. Add garlic. Cook, stirring, for 1 minute or until fragrant. Remove from heat. Cool for 10 minutes.
Place pastry onto a board. Brush with butter. Sprinkle with bacon mixture, cheese and parsley. Cut pastry in half. Cut each half into 10 strips. Twist strips. Place strips onto prepared trays. Spray with oil.
Bake, 1 tray at a time, for 10 to 12 minutes or until golden and puffed. Cool on trays for 5 minutes. Serve warm.
