For the Shallots –
3 medium shallots, thinly sliced
1⁄3 cup white wine vinegar
1 1⁄2 tablespoons sugar
1 1⁄2 teaspoons kosher salt
1⁄2 serrano chile, minced (optional)
For the Chiles –
5 fresno chiles, thinly sliced
1⁄3 cup white wine vinegar
1 1⁄2 tablespoons sugar
1 1⁄2 teaspoons kosher salt
3 garlic cloves, minced