A medium-sized onion has 44 calories, 1.2g protein, 10.3g carbs, and 0.1g fat. Onions are a solid source of vitamins C and B6, potassium, and folate.| Verywell Fit
One tablespoon of olive oil (14g) provides 119 calories, 0g of protein, 0g of carbohydrates, and 14g of fat. Olive oil is a good source of vitamins E and K, and contains trace amounts of potassium.| Verywell Fit