1. Bring the beef, garlic, bay leaves, onions, salt, and 6 cups water to a boil in a 6-qt. dutch oven. Reduce heat to low, cover, and simmer until the brisket is tender, about 3 hours.

2. Remove pot from heat and let brisket cool, uncovered. Transfer brisket to a cutting board; shred with your fingers. Roughly chop meat; transfer to a bowl. Mix in the cheese, lime juice, cilantro, chipotles, scallions, and tomatoes. Season with salt and pepper. Serve the salpicón wrapped in tortillas and topped with paprika and avocado slices.