Line a baking sheet with parchment paper and set aside.
In a food processor combine the pecans, brown sugar, breadcrumbs and tarragon. Pulse until a fine breading has formed.
Place this mixture in a breading dish and then combine egg and milk into a separate breading dish.
Coat a fillet in the egg mixture on both sides then coat in the pecan mixture on both sides. Repeat with remaining fillets.
Place each coated filet on prepared sheet.
Bake for 15-18 minutes, until fish is cooked through.
While the fish is cooking, place sweet potatoes, butter, heavy cream and paprika into a food processor and blend until smooth.
Place a large spoonful on plate and once fish is cooked through place on top of puree.
Notes
*To quickly cook sweet potatoes prick holes all over and place in microwave on potato setting. After they have cooled carefully remove and put into the food processor. **If you plan to substitute another fish or use this recipe for a chicken breast you will have to adjust the cooking times.