shiitake mushrooms and chard pasta

Ingredients

• 1 tablespoon virgin olive oil
• 1 - medium onion, finely chopped
• 2 - cloves garlic, minced
• 1 pound shiitake mushrooms, cleaned and sliced
• 1/2 pound crimini mushrooms or other sliced mushrooms for variety (or use all shiitake)
• 1 large can whole tomatoes, roughly chopped, with juice
• 1 - bunch swiss chard, tough stems removed, roughly chopped
• 1-2 sprig fresh oregano or 1/2 tsp dried
• 1/4-1/2 teaspoon dried chili flakes
• 8 - ounces shredded gruyere cheese
• 2 ounces shredded parmesan cheese for garnish
• 1 pound pasta of your choice