Quick Shrimp Alfredo

Ingredients

• 1 small sweet onion, coarsely chopped
• 1 red bell pepper, seeded and coarsely chopped
• 8 ounces portabello mushrooms, cleaned and sliced
• 2 tablespoons olive oil
• 1 lb shrimp, cooked and tails removed
• 16 ounces ragu light alfredo sauce with parmesan cheese
• 1 lb wide egg noodles, cooked and drained
• 1/2 teaspoon seasoning salt
• 1/2 teaspoon black pepper
• 1 cup parmesan cheese, shredded