Hi Dena,
You mentioned one of my favorite's at TJ's - Chimichurri sauce! We have friends from Argentina who make that when they BBQ. TJ's is almost as good. It used to be in a jar in the non-refrigerated section of TJ's. This is a new sauce, that's refrigerated.
We purchase flap meat (also known as skirt steak) at COSTCO and marinate the meat in the sauce all day in the fridge. We then BBQ the steak. Fantastic. And, lots of leftover steak for steak sandwiches the next day, using crusty rolls, sliced tomatoes, pepper jack cheese and avocado.
Your dinner sounds great. What time shall Alan and I be over?