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