In a small saucepan, combine vinegar and sugar. Bring to a boil over medium-high heat. Reduce heat, and simmer, stirring occasionally, for 2 minutes or until sugar dissolves. Remove from heat, and cool.
Add oil and Dijon mustard, whisking until combined. Cover and refrigerate for up to 2 weeks.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/harvest-salad-sweet-dijon-vinagrette/