Chilled Black Bean Salad

Name: Chilled Black Bean Salad
Ingredients: 1 15 ounce can drained and well rinsed black beans; 2 - 3 tablespoons mild olive oil; 1 1/2 tablespoons balsamic vinegar; 1/4 teaspoon red pepper flakes; 1 healthy squeeze of fresh lime juice; salt to taste; pinch of sugar if desired; cilantro, parsley, or scallion for garnish; 2 avocados and ripe tomatoes, halved