Tomato Cucumber Salad

2-3 tomatoes, chopped
1-2 cucumbers, peeled and chopped
ΒΌ cup sweet onion, minced
2-3 oz feta cheese or soft goat cheese (optional)
4-6 TBSP olive oil
1-2 TBSP cider or wine vinegar
1 TSP Dijon-type mustard
2 TBSP fresh herbs (dill, cilantro, etc.), minced (optional)

Mix tomatoes, cucumbers, and onion in a bowl, crumble the optional cheese over the top. In a separate small bowl or glass, mix the remaining ingredients to make a dressing. Drizzle the dressing over the vegetables, toss and serve.