Remove rib from chard and chop. Roughly chop leaves.
In a large non-stick over medium-high heat and 2 tsp oil. Add mushroom, ¼ tsp salt cook, Add stems cook 7-8 minutes. Add leaves and garlic, cook 3-4 minutes or until wilted.
Make Garlic Bread
Place baguette halves on prepared baking sheet. Drizzle with 2 tsp. olive oil. Top with half the garlic (reserve remaining for sauce) and 2 tsp Parmesan. Bake in hot oven until bread is a light golden brown, 7-10 minutes. While garlic bread bakes, boil pasta.
Cook pasta medium pot in lightly salted water 8-10 minutes or until tender. Reserve ½ cup pasta water.
Make Sauce and finish pasta
Combine ½ cooking water, sour cream, and demi. Add pasta and parm stir until well coated. Stir in veg.