Kate's Marinated Tomatoes and Cucumbers

6 tomatoes, sliced or the equivalent quartered (depends on the variety what is on hand!)

1/2 cucumber, peeled and sliced

2 slices purple onion, separate into rings

1 garlic clove, crushed

1/4 cup chopped parsley

1 Tbsp chopped basil

1 tsp salt

1 tsp sugar

1/4 tsp fresh ground pepper

1/4 cup olive oil

2 Tbsp vinegar

2 tsp prepared mustard

Layer sliced or quartered tomatoes (depends on the size and variety), cucumber, and purple onion in a shallow dish. Sprinkle parsley and basil on top. Combine oil, vinegar, prepared mustard, salt, sugar, pepper, and garlic in a small jar; shake well. Pour mixture over the vegetables. Let stand at room temperature at least 20 minutes. Chill and serve.