Southwest Sweet Potato Salad

Name: Southwest Sweet Potato Salad
Ingredients: 4-5 medium sweet potatoes; 2 cups or 1 can cooked black beans rinsed and drained; 2 roma tomatoes; 1 small red onion; 1 or 2 jalapeños (2 for a bit more spice); 2 limes; 2-3 cloves garlic; salt and pepper; a big splashes red wine vinegar; 2 ripe avocado; fresh cilantro (optional)