Rose loved to watch him cook. Even if all the Doctor did was throw frozen fish and chips in the oven, she enjoyed it.
In fairness, she had tried to make dinner for the two of them, but her attempts had been met with little success. She may have also started a fire one. Now meals on the TARDIS were strictly the Doctor’s department.
He liked to claim cooking to be as exciting as any of their adventures, considering he was trained by famous chefs from all over time and space. Rose didn’t care what he claimed. This was the Doctor doing domestic, and secretly, she loved it.