Cod Au Gratin

Directions

1. Preheat oven to 350F
2. in a saucepan, saute shallots in 1 tbsp. butter over medium heat
3. Add remaining 1 tbsp. butter and decrease heat
4. Add flour and whisk until well mixed
5. Slowly add warm milk, whisking constantly
6. As the sauce thickens, add lemon zest, mustard, salt and pepper, and whisk until well mixed
7. Add half of the Parmesan cheese and turn off heat
8. Grease an oven-safe dish and lay fish fillets onto the bottom, not overlapping
9. Pour sauce over the cod fillets
10. In a bowl, mix croutons with olive oil and mash
11. Sprinkle mashed croutons over the dish and top with remaining parmesan cheese
12. Bake for 30-40 minutes