Arrange the veggies or a baking sheet and place the sheet on the top rack. Lightly spray the veggies with oil and broil them until the skins are charred. It takes around 8-12 minutes for all veggies to roast well.
Remove the veggies after roasting and allow them to cool down. When it’s cool enough to handle, peel the tomatoes and discard the skins. Gently, squeeze the garlic and collect the pulp.
In a large bowl, take peeled roasted tomatoes, roasted garlic, chili pepper and chopped onions. Add salt and crush the tomatoes with other veggies to a smooth pulpy mass. There might be some hard mass while mashing tomatoes. You can either remove those or cut the hard mass into small pieces. Mix everything well.
Now heat a small pan and add oil, and allow it to smoke.
Once the oil smokes, drizzle it over the tomato Choka and mix well. Garnish with chopped cilantro and serve.