Rice, black bean and avocado salad

Place ½ cup cooked brown rice in a bowl with 1 cup canned black beans (rinsed, drained), ½ cup canned corn kernals (rinsed, drained), a handful of baby spinach leaves and 1⁄4 small avocado (diced). Drizzle with 2 tsp lime juice and 1 tsp olive oil.