In a large pot of boiling salted water, cook noodles until al dente; drain. In a bowl, toss turkey with 1 tablespoon paprika; season with salt and pepper. In a large nonstick skillet, heat oil over medium. Working in batches, brown turkey, 3 to 5 minutes; transfer to a plate. Add onion to skillet; cook, stirring, until tender, 4 to 6 minutes.
Return turkey to skillet (along with any juices); add tomatoes (with juice), 1 tablespoon paprika, and 1/2 cup water. Bring to a boil; reduce to a simmer. Cook, breaking up tomatoes with a wooden spoon, until turkey is opaque throughout, 2 to 4 minutes.
Remove from heat, and stir in sour cream; season with salt and pepper. Serve paprikash over noodles.
Ounce for ounce, turkey breast is lower in calories and fat than chicken breast but equally high in protein, B vitamins, and iron.