Related Clues:

• Base for some casseroles
• Casserole fish
• Sushi bar supply
• Deli salad fish
• Omega-3 source
• Warm-water food fish
• Bluefin or yellowfin, e.g.
• Sandwich filling
• ___ melt
• Casserole filler
• Fish for a casserole
• Starkist's Charlie, for one
• ___ melt (sandwich)
• Skipjack or yellowfin
• Army's side