Marinated Steak with Melted Onions

2 tbsp (30 mL)	Barbecue sauce
4 tbsp (60 mL)	Greek or Italian style vinaigrette salad dressing
4	Cloves garlic, minced
	Pepper and kosher salt
1 lb (0.45 kg)	Top Grass Top Sirloin or Inside Round Marinating Steak (1 inch thick)
1	Sweet onion, sliced
4	Baguettes or buns, sliced
	Arugula

1. Combine barbecue sauce, 2 tbsp of the dressing and garlic in sealable freezer bag.
2. Pierce steak all over with fork; add to bag. Refrigerate for 8 to 12 hours.
3. Pat steak dry with paper towel; season with pepper and kosher salt. Discard marinade. Grill over medium-high heat for about 3 minutes per side for medium-rare.Let rest for 10 minutes.
4. Meanwhile, pan-fry onion in dressing over medium heat, stirring often until soft and golden, about 10 minutes. Serve with thinly sliced steak on baguette. Top with arugula.