What structural relationship must remain sound for a main dish concept to be truly versatile?

Answer

The relationship between the protein, starch/vegetable, and sauce.

Truly good main dishes possess structural versatility because the core concept, which involves the relationship between the protein, the starch/vegetable, and the sauce, remains sound even when components are swapped out.

What structural relationship must remain sound for a main dish concept to be truly versatile?
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