Step 1

Place the beans in a large colander. Rinse and drain well.

Step 2

Transfer beans to a resealable container. Add the bell pepper and onion.

Step 3

In a small bowl whisk together the oil, vinegar, sugar, salt and pepper.

Step 4

Add the oil mixture to the beans and stir gently. Cover and refrigerate 12 hours.

Step 5

Toss gently before serving.