Creamy Seafood-Stuffed Shells Recipe

INGREDIENTS

• 24 uncooked jumbo pasta shells
• 1 tablespoon finely chopped green pepper
• 1 tablespoon chopped red onion
• 1 teaspoon plus 1/4 cup butter, divided
• 2 cans (6 ounces each) lump crabmeat, drained
• 1 package (5 ounces) frozen cooked salad shrimp, thawed
• 1 Eggland's Best Egg, lightly beaten
• 1/2 cup shredded part-skim mozzarella cheese
• 1/4 cup mayonnaise
• 2 tablespoons plus 4 cups 2% milk, divided
• 1-1/2 teaspoons seafood seasoning, divided
• 1/4 teaspoon pepper
• 1/4 cup all-purpose flour
• 1/4 teaspoon coarsely ground pepper
• 1-1/2 cups grated Parmesan cheese