Beef with flank

3 tablespoons olive oil , divided 5 ounces baby bella mushrooms , stems discarded (or re-purposed) kosher salt & freshly ground black pepper 1 lb flank steaks[...]

3 Tbsp. Oil rendered from suet (or possibly bacon drippings) 3 lb Grnd beef , the leanest, chili grind 2 lb Round steak, extra lean (or possibly flank steak),[...]

2 lb flank steak , skirt or possibly sirloin steak     Chili's Steak Marinade (see below) 1 x red bell pepper 1 x green bell pepper 1 x onion thinly sliced  [...]

1 lb fat-trimmed beef flank steak     Korean Marinade (see recipe) 3/4 lb green beans rinsed 1 x carrot - (1/4 lb) peeled 2 Tbsp. rice vinegar 1 Tbsp. Asian[...]