Creating Ribeye Steak Crostini With Horseradish Sauce is straightforward if you follow these clear steps:

1. Preheat Oven: Begin by preheating your oven to 400°F (200°C).
2. Prepare the Baguette: Slice the baguette into 1/2-inch thick pieces and arrange them on a baking sheet. Brush lightly with olive oil and season with salt and pepper.
3. Toast the Baguette: Place the baking sheet in the oven and toast for about 5-7 minutes or until golden and crispy. Remove and set aside.
4. Cook the Steak: While the bread is toasting, heat a skillet over medium-high heat. Season the ribeye steak with salt and pepper on both sides.
5. Sear the Steak: Add the steak to the hot skillet and cook for about 4-5 minutes on each side for medium-rare, or until your desired doneness is achieved. Remove from heat and let it rest for 5 minutes.
6. Slice the Steak: Once rested, slice the ribeye thinly against the grain to ensure tenderness.
7. Assemble the Crostini: On each toasted baguette slice, place a few slices of the ribeye steak.
8. Add Horseradish Sauce: Top each steak slice with a dollop of horseradish sauce.
9. Garnish: Finish with chopped chives and, if desired, a few arugula leaves or microgreens for an added touch of flavor and color.
10. Serve Immediately: Arrange the crostini on a platter and serve while the steak is warm.

Following these steps will guide you in creating this incredible appetizer effortlessly.