Sausage and Swiss Chard Pasta

Ingredients (12)

• 12 ounces uncooked orecchiette or small tube pasta (about 2-1/2 cups)
• 1 tablespoon olive oil
• 1/2 pound bulk Italian sausage
• 1/2 cup chopped red onion
• 1 medium fennel bulb, chopped
• 1/2 pound baby portobello mushrooms, chopped
• 3 garlic cloves, minced
• 1 bunch Swiss chard, trimmed and chopped
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 3/4 cup grated Parmesan cheese, divided
• 1/2 cup pine nuts or chopped walnuts, toasted