Preheat oven to 350 degrees F and line a baking sheet with nonstick parchment paper. Add 8 ounces (half) of your mushrooms to the baking sheet and toss with 1 teaspoon Worcestershire, maple syrup and 1 teaspoon olive oil. Spread in an even layer and roast for 35-40 minutes, until they look caramelized (reduced, crispy browned edges).
While mushrooms are roasting, heat a large soup or stock pot to medium heat and add pancetta (Make sure your pot has a lid!). Cook, stirring constantly, until pancetta is browned and crispy. Scoop pancetta into a separate bowl, keeping fat in the pot.
Add 2 tablespoons butter or olive oil, along with remaining mushrooms and diced onion. Cook, stirring every minute or so, until veggies are softened and golden-brown, approximately 10-12 minutes.
Turn heat to medium-low and add minced garlic, 1 teaspoon salt, onion powder, thyme, remaining teaspoon Worcestershire and pepper. Stir constantly for 30 seconds.
Add wild rice, stock, 3 cups water and molasses.. Stir to combine, then bring to a simmer. Cover, leaving lid ajar a few inches. Simmer for 30-45 minutes, until rice is tender but still has some bite. Stir in half and half.
Taste and add salt as you like. Simmer another 5 minutes, then serve with roasted mushrooms and pancetta on top! Leftover soup will keep tightly sealed in the fridge up to 5 days or frozen 3 months.