This document is an excerpt from the EUR-Lex website
This refers to the idea of a non-uniform method of European integration which allows EU countries to select policies, as if from a menu, and involve themselves fully in those policies.
The EU would still have a minimum number of common objectives. However, different countries would integrate at different levels (variable geometry) or at different speeds (multi-speed). Europe ‘à la carte’ is already a reality with some countries being part of the eurozone and others not.