Preheat the oven to 350 degrees F. Remove the pit from each date with your fingers. Slip the sausage out of its casings and stuff each date with an almond-size piece (each will be about 1/2 ounce) of chorizo. Add 1/2 inch of water to a small baking pan and place the dates in a single layer stuffed-side up in the pan. Bake until the chorizo is cooked through, about 10 minutes. Lift the dates out of the pan and top each with hot pepper jelly, if using.