Six years to the day since last taking charge of Chelsea in the Champions League, Mourinho's side on Wednesday night host Basle in Group E.
The Portuguese departed following a draw with Norway's Rosenberg on September 18, 2007, which extended Chelsea's winless run to three games - failure to beat Basle on Wednesday will make it four - after Mourinho delivered a scrambled message on the eve of the match.
It turned out to be a parting shot at Roman Abramovich and the owner's recruitment policy, when Mourinho said: "In the supermarket, you have eggs class one, class two, class three. Some are more expensive than others and some give you better omelettes. So when the class one eggs are in Waitrose and you cannot go there, you have a problem."
Mourinho returned to Chelsea in June assigned with overseeing a developing squad full of potential and he appears intent on tempering expectations.
Asked what his eggs are like now, Mourinho said: "Beautiful young eggs, eggs that need a mum, in this case a dad, to take care of them, to keep them warm during the winter, to bring the blankets and to work and improve them and one day we'll arrive in a moment when the weather changes, the sun rises, we break the eggs and the eggs are ready to go for life at the top level."
Mourinho plans to select four players aged 22 or under for the Blues' first return to the Champions League since last season suffering the ignominy of becoming the first holders to exit at the group stages.
Chelsea responded by winning the Europa League - beating Basle in the semi-finals en route to the trophy - in a competition Mourinho does not want to consider this term.
"I want to try to start the group phase by winning," added Mourinho, who won the 2004 Champions League with Porto and 2010 competition with Inter Milan.
"Last season Chelsea went outside his natural habitat, which is the Champions League.
"Chelsea went out to a competition that is not Chelsea's competition. We don't want to do that again.
"It's important for a team of kids. It's very, very important for them to play on the big stage and the big stage is the Champions League."
Mourinho believes Basle are difficult opponents, but is unconcerned by the Blues' worst start to a Barclays Premier League season in a decade and is intent on victory.
"We've lost one match (at Everton last Saturday)," he said.
"It's Champions League we start tomorrow, zero matches, zero points.
"I have to focus not in the past, I have to focus in the future.
"This is a different situation. Now we have to build a team full of talented players without the experience and without the football philosophy of working together for a long time.
"No obsession for me, no obsession for Chelsea, but I want to win for the third time, I want Chelsea to win for the second time and this is the beginning of a process with the Champions League.
"No dramas. Calm and no pressure, no problem."