In a large nonstick skillet coated with cooking spray, saute the mushrooms, peppers and shallot in oil until tender. Add garlic and pepper flakes; cook 1 minute longer., Stir in the tomatoes, Italian seasoning and salt. Bring to a boil. Reduce heat; simmer, uncovered, for 12-15 minutes or until vegetables are tender., Meanwhile, cook linguine according to package directions. Add shrimp to sauce; cook and stir for 5-7 minutes or until shrimp turn pink., Drain linguine; stir into sauce. Heat through. Sprinkle with parsley.