Chi Kofte (Armenian Steak Tartare)

Ingredients

• ½ tablespoon unsalted butter
• 8 ounces ground beef
• 1 small onion (finely chopped)
• Kosher salt
• freshly ground black pepper
• Paprika
• ¼ cup chopped flat-leaf parsley
• 2 medium tomatoes (or 4 plum tomatoes) (¼-inch diced (about 1 ½ cups))
• 1 cucumber ( peeled and ¼-inch diced (about 1 cup))
• 1 green Italian pepper (Cubanelle) (¼-inch diced (about ¾ cup))
• 4 scallions (thinly sliced)
• ⅓ cup finely chopped flat-leaf parsley
• ¼ cup lemon juice
• 2 tablespoons extra-virgin olive oil
• 2 teaspoons kosher salt
• 1 teaspoon paprika
• 1 teaspoon sumac ((optional))
• 1 ½ cups grade fine bulgur ((cracked wheat))
• 1 ½ cups cold water (plus more as needed)
• 1 ½ pounds very fresh top round (trimmed of all fat and ground 3 to 4 times until fine like a paste)
• 1 tablespoon plus 1 teaspoon kosher salt
• 1 tablespoon paprika
• ½ teaspoon freshly ground black pepper
• ½ cup sliced scallions
• ¼ cup plus 1 tablespoon chopped flat-leaf parsley
• Extra-virgin olive oil (for serving (optional))