Flambeed Pineapple

Cut each pineapple round into 4 wedges. Trim core from point of each wedge, and discard; set wedges aside.

Heat sugar in a large skillet over medium-high heat, stirring, until sugar melts and turns golden brown, 3 to 4 minutes. Add pineapple; toss to combine.

Stand back, and carefully pour in liqueur; immediately tilt skillet slightly, and ignite alcohol. When flames subside and caramel melts, stir in cream, lemon juice, vanilla seeds, and salt. Reduce heat to medium; let sauce boil, stirring occasionally, until thickened, about 5 minutes. Spoon pineapple and sauce over cake slices, and serve immediately.