Adding a hint of lime to whipped cream can truly elevate the flavors of a classic dessert like strawberry rhubarb upside-down cake. From my personal experience, this citrusy touch adds brightness that balances the sweetness and tartness of the baked fruit, making each bite more refreshing and enjoyable. I usually prepare my whipped cream by gently folding in finely grated lime zest and a little fresh lime juice once the cream reaches soft peaks, which preserves its fluffy texture while infusing vibrant aroma. Strawberry rhubarb is a beloved summer dessert pairing thanks to the perfect harmony of sweet strawberries and tangy rhubarb. When paired with an upside-down cake method, the fruit caramelizes on the bottom, creating a luscious topping once flipped. The lime in the whipped cream adds an extra zesty dimension that complements these flavors and adds a lovely contrast to the rich cake base. This dessert is wonderfully easy to make but turns out impressively elegant, great for summer gatherings or casual family meals. I recommend using fresh, ripe strawberries and rhubarb for the best flavor. Additionally, chilling the whipped cream well before serving enhances the airy creaminess and taste. If you want to experiment further, try adding a splash of lime or orange liqueur to the whipped cream for an adult version or sprinkle some toasted coconut on top for added texture. The key is balancing sweetness and acidity, and the lime flavor does just that beautifully. This combination never fails to impress guests and makes a fantastic seasonal treat to enjoy the tastes of summer.