1. Cook orzo according to package directions, omitting salt and fat.
2. While pasta cooks, sprinkle fish with 1/4 teaspoon salt and 1/4 teaspoon black pepper. Heat a large nonstick skillet over medium-high heat. Add 1 tablespoon oil to pan; swirl to coat. Add fish to pan; cook 3 minutes on each side or until desired degree of doneness. Remove fish from pan; keep warm.
3. Add remaining 1 1/2 teaspoons oil to pan. Add crushed red pepper and garlic; sauté 30 seconds. Add spinach; sauté 1 minute or just until spinach wilts. Stir in tomatoes, beans, remaining 1/4 teaspoon salt, and 1/4 teaspoon black pepper; cook 1 minute or just until thoroughly heated. Remove pan from heat. Add pasta to pan; toss to coat. Divide pasta mixture among 4 plates, and top with fish fillets. Serve with lemon wedges, if desired.