1. Place the walnuts in the bowl of a food processor fitted with a blade attachment and pulse until finely chopped but not a paste, about 20 (1-second) pulses. Transfer to a medium bowl.
2. Place the apples and lemon juice in the food processor and pulse until the apples are finely chopped, about 25 (1-second) pulses. Transfer to the bowl with the walnuts.
3. Add the wine and cinnamon to the apple-walnut mixture and stir to combine. Season with salt and pepper to taste. Let the charoset sit until the flavors meld, at least 30 minutes. Serve with matzo.