I have toast and jam for breakfast.
Does it mean that I eat toast and jam separately or together with spread jam on toast?
What about other examples? Does "and" mean separately or together as if combined?
I have cereal and milk for for breakfast.
I have fish and potatoes for dinner.
Edit: I've edited some examples and added new. I need some clarification.
What about bread and butter?
I have bread and butter for breakfast.
I have pastries and milk.
Does it mean here mixed or separate? I mean I first eat pastries, then milk or eat them together?
Can I replace "and" with "with" without a difference in meaning?