Mango and Black Bean Salad - The Scramble

Ingredients

• 1 cup quick-cooking brown rice (about 2 cups prepared)
• 15 oz. canned black beans (drained and rinsed)
• 1 - 1 1/2 cups fresh mango (cut into 1/2-inch chunks, or use frozen)
• 1/4 sweet yellow onion (such as Vidalia, finely diced (about 1 cup))
• 1/4 cup scallions or chives (green parts only, finely chopped)
• 1 lime (juice only, about 2 Tbsp.)
• 1/4 cup fresh cilantro (chopped (optional))
• 1/4 tsp. salt (or more to taste)
• 6 leaves large Boston or butter lettuce (optional)
• 6 whole wheat tortillas (optional)