Heat a large skillet on medium high heat, add 2 tsp oil, roast the sliced onions for 5 minutes, transfer the halved garlic, roast for 3-4 minutes, and set aside.
Next, drizzle 1 tsp oil, roast the whole tomatoes on a skillet covering the lid for about 5 minutes on a medium low heat.
Roast the whole red bell pepper directly on the flame on low heat. Using a tong, turn the stem of a red pepper frequently for about 10-12 minutes until the pepper turns brownish black.
Keep the bell pepper in a glass bowl and cover with a plastic wrap for about 30 minutes. Carefully remove the stems, seeds, and peels of the red pepper.
Transfer the veggies to a blender jar and blend them with ½ cup water until smooth and creamy.
Next, transfer the soup to the pot, add another ¼ to ⅓ cup water, ½ tsp salt, paprika, 1/4 tsp black pepper powder, and simmer it for 5-10 minutes. Adjust the spices according to your taste.