Spanish Cod with Chorizo and Fennel

Name: Spanish Cod with Chorizo and Fennel
Ingredients: 1 fennel bulb, halved and thinly sliced (1 ½ cups), fronds reserved; 5 ounces Spanish chorizo, cut into ¼-inch slices (1 cup); 4 skinless cod fillets (each 4 ounces); Kosher salt and freshly ground pepper; 3 ounces cherry tomatoes, halved, or quartered if large (½ cup); 2 cloves garlic, thinly sliced (4 teaspoons); 2 tablespoons unsalted butter; ¼ cup dry white wine, such as Sauvignon Blanc; 1 small orange; Extra-virgin olive oil and toasted sliced baguette, for serving