Marinade

1 teaspoon lemon zest (or ground lemongrass powder)
1 1/2 tablespoons fresh ginger, minced
1 fresh red chili pepper, minced or 1 teaspoon sriracha hot sauce
2 cups chopped shallots
2 tablespoons vegetable oil
3/4 cup dark brown sugar
1 teaspoon fresh lemon juice, in 1/4 cup water
1/2 cup water
1 1/2 teaspoons kosher salt
3 1/2 teaspoons coriander seeds, ground
Satay

1 tablespoon creamy peanut butter
1 tablespoon soy sauce
1 teaspoon sriracha hot sauce or red pepper flakes, to taste
1 tablespoon brown sugar
2 teaspoons freshly squeezed lime juice
2 teaspoons rice wine vinegar or white wine vinegar
2 teaspoons ginger
1 garlic clove, minced
1/4 cup water
2 lbs tofu, cut into strips and threaded onto metal skewers