A quick and elegant appetizer featuring toasted baguette slices topped with thinly sliced steak, creamy blue cheese butter, and fresh peppery arugula. Perfect for last-minute entertaining or a satisfying snack.
Use unsalted butter to control saltiness. Toast bread just until crisp to avoid burning. Serve crostini immediately to prevent sogginess. Blue cheese butter can be made ahead and refrigerated. For gluten-free, swap baguette with gluten-free bread or crackers. Thinly slice steak for best texture. Optionally add lemon juice for brightness.
Keywords: steak crostini, blue cheese butter, arugula, appetizer, easy entertaining, quick snack, finger food, leftover steak recipe