For balsamic vinegar marinade
- Mix all the ingredients for the marinade in a small bowl and set aside.
For King oyster mushroom
- Preheat oven to 400 degrees.
- Line the baking sheet with parchment paper.
- Lay the mushroom and brush with melted vegan butter.
- Sprinkle some salt.
- Bake for 10 minutes.
- Broil for 5 minutes and set aside.
For red onion
- Heat the cast iron pan with grill marks with 1/2 tablespoon of grapeseed oil.
- Once the pan is heated (4-7minutes), place the onion on the pan and cook for 3-4 minutes on each side. Do NOT move the onion around. It won't develop the grill marks if you move it around.
- When onions are cooked, move them out of the pan and set them aside.
For eggplant
- Keep your oven to 400 degrees Fahrenheit.
- Line a baking sheet with parchment paper and keep it close to the cast iron pan.
- Add the cut eggplants with 2-3 tablespoons of balsamic vinegar marinade in a large bowl and toss to coat.
- On the same cast iron pan, place the eggplant and cook for 3-4 minutes. Do not move the eggplant once you place them on the pan. Otherwise, it won't develop the grill marks.
- Flip the eggplants and continue to cook for additional 2-3 minutes.
- Transfer the eggplants to the baking sheet and brush the eggplants with balsamic marinade. Sprinkle some salt over.
- Place them in the oven and cook for 5 minutes.
- Take them out of the oven and set them aside.
For zucchini and yellow squash
- Keep your oven to 400 degrees Fahrenheit.
- Line a baking sheet with parchment paper and keep it close to the cast iron pan.
- Add the cut zucchini and yellow squash with 2-3 tablespoons of balsamic vinegar marinade in a large bowl and toss to coat.
- On the same cast iron pan, add the remaining 1/2 tablespoon of grapeseed oil.
- Place the vegetable on the pan and cook for 3-4 minutes. Do not move the vegetable once you place them on the pan. Otherwise, it won't develop the grill marks.
- Flip the vegetable and continue to cook for additional 2-3 minutes.
- Transfer the vegetable to the baking sheet and brush them with balsamic marinade. Sprinkle some salt over.
- Place them in the oven and cook for 5 minutes.
- Take them out of the oven and set them aside.
For mini sweet pepper
- Add the peppers with 1-2 tablespoons of balsamic vinegar marinade in a large bowl and toss to coat.
- On the same cast iron pan, place the pepper and cook for 2-3minutes.
- Flip the peppers and continue to cook for additional 2 minutes.
- Take it out of the pan and set it aside.
For sandwich
- Cut the focaccia bread horizontally with a bread knife.
- Smear about 1-2 tablespoons of pesto of your choice on both sides of the bread.
- Layer the grilled vegetables on top of the bottom part of the bread.
- Top it off with the focaccia bread and cut it into a little slider size. Secure with a toothpick so the vegetables won't slide off of the sandwich.