This is way to easy.
Start your grill & put on a vegetable grill pan. Or you could put some foil on the grill & poke some holes.
In a large vip lock bag add 1/2 cup olive oil, seasoned salt 3 Tbls balsamic vinegar. Cut your veg’s into thick 1/2″ slices & into bag toss and let sit 15 – 30 minutes.
We have done this inside on the stove top with a grill frying pan too.