Grilled Adobo Beef Steak Tacos with Creamy Chipotle Salsa and Tequila Pickled Red Onions

Ingredients

• 1 beef Flat Iron Steak (about 8 ounces each)
• 1-1/2 tablespoons black peppercorns
• 4 fresh thyme sprigs
• 1-1/2 cups thinly sliced red onion
• 1/2 cup tequila
• 1/4 cup honey
• 1/4 cup apple cider vinegar
• 1-1/2 teaspoons kosher salt
• 2 slices yellow onion, 1/2 inch thick
• 1 cup fresh cilantro springs (about 1/2 bunch)
• 1 can (7 ounces) chipotle peppers in adobo sauce
• 2 cloves garlic
• 1 teaspoon coarse grind black pepper
• 1/2 teaspoon kosher salt
• 1/2 cup olive oil
• 8 small corn tortillas, warmed
• 1/4 cup crumbled cotija cheese
• 1/4 cup crumbled queso fresco cheese
• 1 large avocado, cut into 8 slices
• 1/2 cup chopped fresh cilantro leaves
• 1 lime, cut into 8 wedges