Traditional Dutch pancakes with sweet and savoury toppings—great fuel before sightseeing; café typically open from 8:00AM. Prebook weekend seats if possible.
Travel Luxembourg→Munich either by early flight or high-speed train (allow 3–4+ hours); grab coffee and pastry en route or at the station (stations open from ~6:00AM).
Flights are ~1h15m; trains take ~7–8 hours—choose morning flight to maximise time in Venice. Cafés open from early morning for a quick Viennese pastry.