Mouthwatering French Dip Sliders With Gooey Provolone

Ingredients

• 12 dinner rolls, sweet variety
• 14 ounces roast beef, thinly sliced from deli counter
• 10 slices of provolone, from the cheese section
• 3 tablespoons butter, unsalted
• 1 medium onion, cut into thin slices
• 2 teaspoons minced fresh thyme leaves
• 1/4 teaspoon salt (kosher preferred)
• 1/4 teaspoon freshly ground black pepper
• 1/2 cup melted butter, unsalted
• 1 1/2 tablespoons onion soup mix from packet
• 1 packet of au jus mix
• 3 cups water, room temperature
• Chopped fresh parsley for decoration (if you want)