Refresco De Avena(Dominican Republic) - cooking recipe

Ingredients

1/2 cup piloncillo sugar, grated (or dark brown sugar)
1 quart warm water
2 ounces old fashioned oats, not instant (1/2 cup)
1 small lime, peeled, halved, and reserved
1/2 teaspoon cardamom seed (optional)

Preparation

Dissolve the sugar in the water in a large container.
Steep the oatmeal, lime peel, and cardamom, if using, in the sugar water for 1-2 hours.
Strain and serve over ice with a squeeze of lime juice.