Polenta Rounds with Fried Eggs and Avocado Bean Salsa

Ingredients (10)

• 1/4 cup chopped red onion
• 3 tablespoons red wine vinegar,
• 1/2 kosher teaspoon salt
• 15 ounces black beans,
• 1 ripe avocado,
• 1/4 cup fresh cilantro leaves,
• 2 tablespoons olive oil
• 8 3/4-inch-thick slices cooked polenta rounds
• 4 large eggs
• Kosher salt and black pepper,