Bring 2 cups water to a boil in a saucepan.

Add 1 cup rice, 1 tsp olive oil, and 1/2 teaspoon salt to the boiling water.

Cover the saucepan with a lid and reduce to a simmer.

Simmer for 15 minutes, then remove from heat.

Do not take the lid off at any time during simmering.

Let the rice rest for another 15 minutes, with the lid on at all times.

Spread the rice on a cookie sheet so it can come to room temperature.

Add corn, beans, green pepper, onions, garlic, cilantro, vinegar, oil, and cumin to a large mixing bowl.

Mix well to combine all ingredients in the bowl.

Add the cooked rice to the mixing bowl.

Mix everything together thoroughly.

Add salt and pepper to taste.

Serve at room temperature or chilled.