This is delicious! Definitely serve over mashed potatoes. (or Cauliflower Mashed "Potatoes"!!! - pictured below).
1 c chopped onion
1 lb boneless top round steak, trimmed
1 can diced tomatoes with basil, garlic, & oregano, undrained (14.5 oz)
1/2 c light beer
2 tbsp molasses
1/4 tsp salt
Place onion in slow-cooker. Heat a large nonstick skillet over medium-high heat, coat pan with cooking spray. Add steak, cook 3 min on each side or until browned. Place steak over onions in slow-cooker, and pour tomatoes w/ basil, garlic, & oregano and beer over steak. Cover and cook on low for 8-9 hours or until steak is very tender. Once the steak is tender enough, shred the steak with two forks. Stir in molasses and salt. Let stand 10 min before serving.
Original recipe found here.