The summer version of short ribs! Marinate (equal parts soy, sugar, rice wine + some ginger and garlic, or try this awesome recipe:
http://cooking.nytimes.com/recipes/1014547-korean-style-short-ribs) and throw on a hot grill for a minute or two on each side and you've got dinner!
Note: Grass fed Longhorn beef is VERY lean and cooks 30 -40% faster. Please adjust recipe times accordingly!