Spray a 9x13-inch dish; quarter rolls and arrange in dish, reserving icing.

Whisk eggs, cream, vanilla, cinnamon, and syrup in a large bowl.

Pour evenly over rolls; press gently to coat and add optional pecans.

Cover tightly with foil; freeze up to 2 months or bake immediately.

If frozen, thaw refrigerated overnight and rest at room temperature 30 minutes. Heat oven to 350°F.

Bake covered 25 minutes, then uncovered 10 minutes until golden and set.

Drizzle with reserved icing while warm; serve immediately.