Roasted Beet Tartare

Ingredients

• 1 red beet
• 1 golden beet
• 3 tablespoons extra-virgin olive oil, divided
• ¼ cup minced red onion
• 3 tablespoons chopped fresh parsley
• 1 tablespoon capers
• 2 tablespoons Dijon mustard
• Zest and juice of 1 orange
• 1 teaspoon Worcestershire sauce
• Kosher salt
• Freshly ground black pepper
• 4 large eggs
• ¼ cup crème fraîche
• 8 slices ciabatta
• 2 tablespoons unsalted butter, at room temperature