Brazilianesque black bean salad

Ingredients

• 2 cups cooked, drained black beans (canned are fine, just rinse off the salt)
• 2 tablespoons minced white onion
• 3 tablespoons chopped fresh cilantro
• 3 tablespoons fresh lime juice
• 5 tablespoons best-quality olive oil
• 1 teaspoon ground cumin
• Salt
• Freshly ground black pepper
• 1 red bell pepper, roasted, peeled, seeded and cut into about 1/2 -inch dice
• 1 cup diced hearts of palm
• 1 cup grape tomatoes, quartered lengthwise
• 1 medium ripe Hass avocado, peeled, seeded and diced