To caramelize a larger quantity of onions (4 to 8 cups), use a large Dutch oven. You won't need additional olive oil.
1 1/2 teaspoons olive oil
3 cups vertically sliced onion (sweet, yellow, white, or red onion)
How to Make It
Heat oil in a 12-inch nonstick skillet coated with cooking spray over medium-high heat. Add sliced onion, and cook for 5 minutes, stirring frequently. Continue cooking 15 to 20 minutes or until deep golden brown, stirring frequently.