Turkey Burger

INGREDIENTS

• One 8-ounce can water chestnuts, drained and coarsely chopped
• 1 tablespoon sambal oelek, optional
• 1/4 cup mayo mixed with 2 teaspoons sambal oelek
• 1-inch piece fresh ginger, peeled and grated
• Extra-virgin olive oil
• 1/2 bunch fresh cilantro leaves, finely chopped
• 4 slices raw red onion
• 1 onion, cut into 1/4-inch dice
• 4 slices Cheddar
• 1/4 cup soy sauce
• Butter lettuce
• 4 seeded burger buns
• 4 slices beefsteak tomatoes
• 1 1/2 pounds ground turkey
• Kosher salt
• 2 cloves garlic, smashed and finely chopped