Mushroom Sandwich Melts

Bahan-bahan (36 porsi)

• 1 medium onion (diced)
• 3 g arlic cloves (pressed)
• 2 Tbsp unsalted butter
• 24 oz 1 1/2 lbs white mushrooms, diced
• 8 oz Bacon (chopped into thin strips)
• 2 Tbsp mayonnaise
• 1/4 to 1/2 tsp salt (or to taste)
• 1/4 tsp black pepper (or to taste)
• 2 1/2 cups 8oz Mexican cheese blend, finely shredded*
• 1/4 cup fresh chopped parsley (plus more for garnish)
• 2 soft French baguettes (sliced into 1/2" thick toasts)