Preheat oven to 400 degrees F. Place cherries in an oven proof baking dish and sprinkle with sugar. Roast the cherries for 35-40 minutes. Allow to cool completely.
Combine the red zinfandel and Kirsch in a pitcher with the roasted cherries and any remaining juice. Add orange slices and refrigerate for 3 hours or up to overnight.
Serve over ice, top with a hefty pour of the cava rosé and garnish with mint or basil leaves and make a toast to your health.