Tomato-corn relish

Makes 2 1/2 cups
2 medium tomatoes, seeded and diced
1 cup corn kernels
1/2 cup diced green bell pepper
1/2 cup diced celery (optional)
1/3 cup diced onion
2 1/2 Tbsp. white wine vinegar
1 garlic clove, minced
1/2 tsp. sugar
1 Tbsp. Dijon-style mustard
1/4 tsp red pepper flakes
salt, to taste
1.  Combine all ingredients in a bowl and let marry for 30 minutes.
2.  Serve as picnic side dish, or as condiment to hot dogs and burgers.