That adorable thing would be called a kalette: a cross between kale and brussels sprouts. I bought mine at Super Target, so it would appear that we regulars have access to these little wonders without a trip to any special grocery store
It is peak cozy, nutritious, and cool-weather wonderful.
Make sure to perform a quick release when beef is done cooking. A natural release will overcook the beef, breaking it down to a stew-meat like texture. Choose a tender beef cut like flank steak or top sirloi. Make sure to slice the beef against the grain.