Dellamorte's Sangria Recipe

Thanks to some advice from Jeffrey Morgenthaler, a mixologist and writer from Portland, OR,  my sangria is better than ever and was a great success at my last party. I've combined suggestions from Jeffrey's site with my own recipe for something fruity and absolutely delicious...

1 750 ml bottle red wine
(Try an inexpensive, dry yet fruit-forward red wine, preferably from the Rioja region of Spain.)
2 cups cranberry pomegranate juice (100% fruit juice, not cocktail or juice drink)
1 cup mandarin orange flavor seltzer water
3/4 cup Grand Marnier
1/2 cup freshly-squeezed orange juice
2 tbsp sugar
1 tsp Angostura bitters

Mix all the ingredients together in a large pitcher until the sugar has dissolved. Add slices of fresh seasonal fruit (my favorites are apples, oranges, and lime), and serve in large wine goblets over ice. It only gets better as it sits, so I will often make this at least a half hour in advance.