Legal Seafoods (if your on the east coast). They have high quality fish and shellfish that you can have prepared anyway you like. Also, they have sides like steamed brown rice and broccoli.
Just last night I had the grilled Haddock with two side skewers of grilled shrimp. Steakhouses....places like Atlantic Fish Co, etc. If you're in rush, any true deli should have options that could work for you. Turkey on wheat - etc.