However, itâs also a time to be aware of the dangers soaring temperatures can bring. Extreme heat is the number one weather-related killer in the U.S, claiming more than 650 lives across the nation each year, according to the Centers for Disease Control and Prevention.
1 In a bowl whisk together garlic, extra virgin olive oil, balsamic, 1/4 cup red wine, 1 tablespoon chopped rosemary, salt and pepper.  Place flat iron steak in a resealable plastic bag. Pour marinade over the top. Shake to coat steak in marinade. Refrigerate for 8 hours or overnight.
Marinated Flat Iron Steak. Introduction. This marinated flat iron steak recipe is soooo yummy. As tender as a filet, but without the price tag. (Note that the calorie count is somewhat inflated, since most of the marinade gets thrown away, rather than consumed.) This marinated flat iron steak recipe is soooo yummy. As tender as a filet, but without the price tag.