Salad Bowl: A salad bowl or tossed salad is a metaphor for the way a multicultural society can integrate different cultures while maintaining their separate identities, contrasting with a melting pot, which emphasizes the combination of the parts into a single whole. (Article) 

Melting pot: The term melting pot is defined as a place where people of different ethnic origins and cultures all come together to mix and merge, creating a new culture — not necessarily a monolithic or homogeneous one, but one that is reflective of some sort of shared template for society. For example, America. (Article) 

Read more: Accepting radical otherness