Recipe: Roasted Onions


Mar 03
Roasted Onions, starch-free gravy

Onions may be used to thicken soups, sauces and gravies instead of starches. If you are on a starch-free diet like SCD or GAPS, you will love these roasted onions!

Roasted onions add flavor and umami to any dish.

I mainly use these onions to flavor and thicken soups and gravies.

Onions are Nutritious

Onions have a good nutrient profile and most people can tolerate onions, except if you are on a low fodmap diet.

Onions are high in vitamin C, folate, potassium, choline, vitamin A, fiber, magnesium and phosphorus.

Onions are considered strongly anti-inflammatory and low on the glycemic index.

Most importantly, onions are sulfur rich.

Why is sulfur important?

One doesn’t usually hear about sulfur. But it is very important for many metabolic processes in the body.

Sulfur is Necessary for Many Important Metabolic Processes

  • Sulfur is required for the synthesis of glutathione, a critical antioxidant that protects us against free radicals and helps the liver neutralize toxins.
  • Sulfur is required for taurine synthesis. Taurine is essential for proper functioning of the cardiovascular system, the muscles and the central nervous system.
  • Sulfur binds the two chains of amino acids that form insulin, a critical hormone necessary for sugar metabolism.
  • Sulfur is part of the amino acid methionine, a critical aspect of methylation and gene expression.
  • Sulfur is part of the amino acid cysteine, another important part of glutathione.

Recipe: Roasted Onions

Roasted Onions, starch-free gravy
  • Author: Dr. Jill
  • Prep Time: 2 minutes
  • Cook Time: 1 hour
  • Total Time: 1 hour


  • 2 large yellow or sweet onions, unpeeled


  1. Place the unpeeled onions in a baking dish
  2. Roast at 425º F for about 1 hour or until the skins are deep golden brown and blistered
  3. Pierce with a knife to be sure it is soft inside
  4. Serve without the skin, with butter, olive oil, balsamic vinegar, coconut cream, sour cream or just sea salt or go ahead and use them for gravy

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I use these roasted onions in my delicious starch-free gravy!

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