Sprinkle Italian seasoning and pepper over trout fillets. Coat a large nonstick skillet with cooking spray; place over medium-high heat until hot. Add fillets, and cook 4 minutes on each side or until fish flakes easily when tested with a fork. Place 1 fillet on bottom half of each bagel; top each with 1/4 cup sprouts, lettuce, tomato, onion, and bagel tops.
Note: Serve this hearty sandwich with Ranch Slaw, Corn Relish, and taro chips.