COOK IT.
While your grill is heating up, grab a skillet and place it over medium heat. You could use a side burner or your kitchen range. Once warm, add 1 tablespoon of olive oil and coat the pan.
Add the diced yellow onion and cook until translucent (until you see a light golden color).
Add the minced garlic and sauté about 30 seconds (until fragrant).
Add in your chopped tomatoes, chopped oregano, chopped basil, & 1 tsp Kosher salt, and stir well.
Allow the sauce to simmer over medium heat until the kebabs are done (about 20 minutes) stirring occasionally.
Next, place your kebabs on the grill over direct heat.
Cook for 20 minutes, turning frequently so all sides cook evenly until all the veggies are tender when pierced with a fork.
Pull kebabs off the grill, top with tomato sauce, and serve immediately.
Bon appetit!