Vegan French Onion Mac & Cheese

Name: Vegan French Onion Mac & Cheese
Ingredients: 3 lbs. Yellow or Brown Onions; 2 Tbsp Vegan Butter; Salt to taste; Sugar to taste; 1 Tbsp Brandy or Cognac ((optional)); 1/4 cup Vegan Beef Broth ((or Veggie Broth)); 1 Tbsp Vegan Worcestershire; 1 tsp Fresh Thyme Leaves; 1 lb. Elbow Macaroni; 1/2 cup Vegan Butter; 1 Tbsp Red Wine Vinegar; 3/4 cup 90g Flour; 4 cups Plant-Milk (unsweetened); 1 Tbsp Dijon Mustard; 16 oz Vegan Cheese*; 3 - 4 Tbsp Vegan Parmesan ((optional))