Heat the olive oil in a large saute pan on medium heat.
2 tablespoons olive oil
Add the mushrooms, onion, salt, and pepper and sauté until they're soft, about 8 minutes.
12 ounces mushrooms, 1/2 onion, 2 teaspoons salt, 1/2 teaspoon pepper
Add the garlic to the skillet and cook for about 30 seconds until fragrant.
2 garlic cloves
Reduce the heat to low, add the cream and broth, and bring to a slow simmer.
1 cup heavy cream, 1 cup bone broth
Whisk in the tapioca starch slurry and cook for 5 minutes, whisking frequently.
2 tablespoons tapioca starch
Let cool and store in the fridge or freezer.