Tight End Manly Grilled Portobello Mushroom ‘Burgers « Gourmet Safari

Ingredients

• 4-5 Portobello mushrooms, washed
• 4 yellow Spanish onions, sliced
• 2 tablespoons extra virgin olive oil
• 2 tablespoons sugar
• ½ cup mayonnaise
• 2-3 tablespoons sweet chili sauce
• 2 cups Gouda or cheddar cheese grated
• 1 bunch romaine lettuce, finely shredded
• 8 small dinner rolls (or 24-inch whole grain baguette, sliced into 8 equal portions)