Gingered Cranberry Punch

Ginger syrup:
1 C water, 1/2 C sugar, 1/4 C chopped fresh ginger
Stir together in small saucepan and simmer for 30 minutes. Strain and chill.
1 liter ginger ale, chilled
32 oz cranberry-apple juice, chilled
1 T grenadine (optional)
In a punch bowl, stir together with 1/4 C of ginger syrup. Float an ice ring in it and garnish with roses or rose petals.