Sauté vegetables. Next, add 2 tablespoons of olive oil to the pot, keeping it at medium-high heat. To the olive oil, add 1 cup of sliced carrots, 1 cup of sliced celery, and 1 cup of diced yellow onion. Sauté until the veggies until tender, fragrant, and translucent, about 4 to 5 minutes. Next, add 1 teaspoon of minced garlic to the other veggies and sauté for about 30 seconds to a minute.