Marinated Cucumber, Onion, and Tomato Salad

Ingredients (9)

• + 1 cup water add to pantry
• + ½ cup distilled white vinegar add to pantry
• ✓ ¼ cup vegetable oil
• + ¼ cup sugar add to pantry
• + 2 teaspoons salt add to pantry
• + 1 tablespoon fresh, coarsely ground black pepper add to pantry
• + 3 cucumbers, peeled and sliced 1/4-inch thick add to pantry
• ✓ 3 tomatoes, cut into wedges
• + 1 onion, sliced and separated into rings add to pantry