2 large turkey thighs (1 3/4 pounds each), skin removed, meat cut into 1-inch pieces
1/2 cup Hungarian sweet paprika or Hungarian hot paprika (or a mixture of both)
2 teaspoons coarse kosher salt
1 teaspoon freshly ground black pepper
3 tablespoons olive oil
2 large onions, chopped (about 3 cups)
2 large russet potatoes (about 1 1/2 pounds total), peeled, cut into 1-inch pieces
4 cups low-salt chicken broth
1 14 1/2-ounce can pure pumpkin
4 garlic cloves, chopped
1 bay leaf
1 large fresh thyme sprig plus 3 tablespoons chopped fresh thyme, divided
1 1/2 pounds egg noodles
5 tablespoons butter
1 tablespoon caraway seeds
Place turkey, paprika, 2 teaspoons salt, and 1 teaspoon pepper in large resealable plastic bag. Seal bag; shake. Heat oil in large pot over medium-high heat. Remove turkey from spice mixture (reserve spice mixture in bag). Add turkey to pot; cook 5 minutes. Place onions and potatoes in bag with spice mixture. Seal bag; shake to coat. Add vegetables to pot; cook 5 minutes, turning occasionally. Add broth, pumpkin, garlic, bay leaf, and thyme sprig; bring to boil. Reduce heat; cover and simmer until potatoes begin to fall apart, about 1 hour.
Discard thyme sprig. Stir in 1 tablespoon chopped thyme. Season stew with salt and pepper.
Cook noodles in large pot of boiling salted water until tender but still firm to bite, stirring occasionally. Drain noodles; return to pot. Add butter and caraway seeds to noodles. Toss until butter melts. Divide noodles among bowls; top with stew. Sprinkle with remaining 2 tablespoons chopped thyme. Serve, passing sour cream alongside.