These are best imho used on a gas burner. When I have an electric stovetop, I still do the old-fashioned thing, boiling water separately on the stovetop in a pan or kettle. Or, use a waterboiler. Then I use a French press, of glass, which has been warmed with warm then hot water, to temper it a bit, put in the amount of medium espresso grounds, fill with boiling water, let steep.
Italian coffee, or espresso, is served hot, black. Or, with a frothy steamy cream or milk. Though I prefer mine either black, or with actual liquid (not whipped, not frothed, just liquid) cream, with a splash of whole milk.