1 (4-pound) free-range chicken
Reserved shells from shrimp, see below
6 scallions
4 cloves garlic
1 stalk lemongrass, lightly smashed, or zest of 1 lemon
1 tablespoon whole black peppercorns
1 (2-inch) piece fresh ginger, sliced thick
4 kaffir lime leaves, fresh or frozen, or juice and skin of 1 lime
2 serrano chiles, halved lengthwise
1 recipe Asian Chicken Stock
1 (15-ounce) can straw mushrooms, drained and rinsed
2 limes, juice and skins
4 serrano chiles, halved lengthwise
1 teaspoon fish sauce, or more to taste
5 kaffir lime leaves, fresh or frozen, optional
Kosher salt
1 pound large shrimp, shelled and sliced in 1/2 lengthwise
2 tablespoons chopped fresh cilantro leaves, plus more for garnish
1 tablespoon Thai basil leaves or regular basil leaves