1 medium onion, sliced
1 jalapeno, seeds removed and sliced
1 (2 1/2 pound) boneless chuck roast
1 teaspoon salt
1 teaspoon chili powder
1 teaspoon ground cumin
1/4 teaspoon ground cinnamon
2 bay leaves
3 cloves garlic, chopped
1 (4 oz) can Old El Paso chopped green chiles
1 (18 oz) can Progresso Fire Roasted Tomato Recipe Starter Cooking Sauce
1 1/2 cups beef broth
1 box (4.6 oz) Old El Paso taco shells (12 shells)
1 cup shredded lettuce
1/4 cup shredded cheese


Place half of the onions and the jalapeno slices into the bottom of a 3 1/2- to 6-quart slow cooker. Place the beef on top of onions and jalapeno slices then season with salt, chili powder, cumin and ground cinnamon.
Scatter bay leaves, garlic, chopped green chiles and the remaining onion slices on top of beef.
Add Fire Roasted Tomato Recipe Starter and broth.
Cover slow cooker then cook on low for 6 to 8 hours or until beef is tender.
Using tongs, remove beef from slow cooker then use two forks to shred the beef, and then return shredded beef to sauce.
Fill taco shells or tortillas with beef and onions then top with shredded lettuce and cheese.