This cheesecake-style tart is not made like a traditional cheesecake but more in the style of tiramisu, resulting in filling that is fluffy but decadently rich at the same time.
Beat the cream cheese to soften it, then set it aside.
Whisk the egg yolks, sugar, lime zest, lime juice, rum, and vanilla in a metal bowl. Place the bowl over a pot of gently simmering water, and whisk the mixture by hand, or with electric beaters, until it leaves a “ribbon” when the whisk is lifted, about 5 minutes.