Few foods can satisfy a broad range of appetites quite like the humble taco. Prefer chicken to beef? Great. Don’t want meat at all? Not a problem. Crave tons of toppings tumbling from your tortilla?

A taco bar at home is fun and festive. All the filling components can be made ahead, placed in small serving bowls, and refrigerated. Start by roasting salmon slathered with an easy chile paste, then ...