Spinach and Havarti Stuffed Portobello Mushrooms

Bahan-bahan (4 porsi)

• 4 Portabello Mushroom Tops (12 oz total, stems removed)
• 1 Tbsp lemon juice
• 3 Tbsp olive oil
• 2 Tbsp chopped fresh parsley
• 1/2 tsp sugar
• 1/2 tsp salt
• 1 large or 2 small garlic cloves (pressed)
• 2 tsp balsamic vinegar
• 4 slices havarti cheese
• 1 1/2 to 2 cups fresh spinach leaves
• 4 kaiser rolls
• 1 Fresh garden tomato (sliced)
• Mayo to taste