Anti-Inflammatory French Onion Soup with Mushrooms, Extra Herbs & Cheesy Croissant Topping

Ingredients

2 large onions, thinly sliced
1 tablespoon olive oil
2 cups mushrooms, sliced
4 cups vegetable or chicken broth
1 teaspoon turmeric (anti-inflammatory)
1 teaspoon garlic powder
1 tablespoon fresh thyme (plus extra for garnish)
1/2 cup dry white wine (optional)
Salt and pepper to taste
2 gluten-free croissants (or regular croissants, if preferred)
1 cup shredded cheese (such as Gruyère or a dairy-free cheese for a gluten-free version)
Instructions