Season the fish with salt and pepper then dredge in the flour. Heat a large saute pan with olive oil until very hot add the fish and brown each side well about 2 minutes on each side. Place in a350 degree oven and cook about 5-6 more minutes or just until the fish is just cook through. Remove from the oven and place fish on a tray. Place the saute pan on high heat add garlic and white wine and cook scraping the bottom of the pan to remove the fond. Add the fish stock and reduce a bit about 2-3 minutes. Add capers lemon juice, tomatoes, and asparagus and cook just until the asparagus is tender about 2-3 minutes on high heat. Add mustard greens and cook just until they begin to wilt. Stir in butter then tarragon and season with salt and pepper. Pour mixture over fish and serve hot. Per serving: 215 Calories (kcal); 13g Total Fat; (62% calories from fat); 3g Protein; 14g Carbohydrate; 25mg Cholesterol; 50mg Sodium Food Exchanges: 1 Grain(Starch); 0 Lean Meat; 1/2 Vegetable; 0 Fruit; 2 1/2 Fat; 0 Other Carbohydrates Converted by MM_Buster v2.0n.