1In 5-quart saucepan or Dutch oven, cook pasta as directed on package. Drain; return to saucepan. Stir in spinach, tomatoes and 2 teaspoons of the oil. Cover to keep warm.
2While pasta is cooking, in 12-inch nonstick skillet, heat remaining 1 teaspoon oil over medium-high heat. Add onion; cook and stir 1 minute. Add shrimp, garlic and pepper flakes; cook and stir 2 minutes.
3Stir in wine, broth, salt and pepper; cook 2 minutes or until shrimp are pink and firm. Remove from heat; stir in parsley and butter until butter is melted. Add shrimp mixture to pasta mixture in saucepan; toss to mix.