Cut bacon strips in half.
Wrap each chestnut with a piece of bacon and secure with a toothpick.
Cook bacon/chestnuts at 350°F on a baking sheet until bacon is cooked.
Place cooked rumaki in a Pyrex pan and cover with sauce. Let marinate overnight.
Before serving, put in a 350°F oven for about 20 minutes or until hot and bubbly.