Tacos

INGREDIENTS

• 2 avocados, pitted and peeled
• Juice of 2 limes
• 1/4 cup chopped fresh cilantro, leaves
• 1 teaspoon coarse salt, plus more to taste
• 1/4 teaspoon freshly ground pepper, plus more to taste
• 1 tablespoon olive oil
• 1 yellow onion, cut into 1/2-inch dice
• 1 pound ground sirloin
• 1 teaspoon dried oregano
• 1/4 teaspoon ground cumin
• 12 corn tortillas
• 8 ounces cheddar cheese, grated
• 1/4 head iceberg lettuce, shredded
• 1/2 cup sour cream
• Tomato Salsa