Rhubarb Crumble Ice Cream | Reader's Digest Canada

Ingredients

• 3 cups diced fresh rhubarb or sliced frozen rhubarb
• 2/3 plus 3/4 cups sugar (divided)
• 2/3 cup water
• 1 tablespoon butter
• 1/3 cup quick-cooking oats
• 1 tablespoon brown sugar
• 1/4 teaspoon ground cinnamon
• 1-1/2 cups heavy whipping cream
• 1-1/2 cups half-and-half cream
• 1 teaspoon vanilla extract