Grilling or barbecuing? I’m assuming you mean grilling since you mention veggies.
Steaks I like to rub on the good seasons Italian dressing from the packets. I rub it on dry, and then grill. You can add some oil to the meat if you want.
Shish kabobs—you can buy the wooden sticks really cheap at the supermarket. Marínate the meat, or just salt, cut in cubes, large pieces of onion, bell pepper, mushrooms, cherry tomatoes.
Pound or chicken breast and marinate in mojo, or your favorite marinade, and grill.
Grilled asparagus is really good. A little olive oil and salt, and grill.
Pork tenderloin, marinate in soy sauce for an hour or longer, then grill to medium well.
If you mean slow cooked barbecue, then pork ribs, salt well, and cook according to direction. Check google, I don’t know the timing for pork ribs.