1/2 cup water 1 tablespoon all-purpose flour 2 cups unsalted chicken stock (such as Swanson) 1/2 cup white wine 1/4 cup chopped fresh oregano 1/4 cup drained capers 1/2 teaspoon kosher salt 1/2 teaspoon crushed red pepper 8 garlic cloves, chopped 1 (28-oz.) container diced tomatoes (such as Pomì) 1 (8-oz.) pkg. cremini mushrooms, quartered 8 (6-oz.) bone-in chicken thighs, skinned (about 3 lb.) 2 tablespoons extra-virgin olive oil 12 ounces uncooked spaghetti, broken in half 5 ounces baby spinach 2 ounces Parmesan cheese, grated (about 1/2 cup)
How to Make It
Combine 1/2 cup water and flour in a 6-quart electric slow cooker, stirring with a whisk. Stir in stock and next 8 ingredients (through mushrooms). Add chicken thighs to stock mixture; submerge in liquid. Cover and cook on LOW 7 1/2 hours. Remove chicken. When cool enough to handle, remove bones from chicken; discard bones.
Add oil and pasta to slow cooker; cover and cook on HIGH 15 minutes or until pasta is done. Stir in spinach until wilted. Divide pasta mixture among 8 shallow bowls; top evenly with chicken. Sprinkle with Parmesan cheese.