Savory Roast Beef Sliders with Onions - Recipes by Clare

Ingredients

• 12 slider rolls (e.g., King’s Hawaiian, dinner rolls, or slider buns)
• 1 ½ pounds deli roast beef, thinly sliced or shaved
• 4-6 slices white cheese (e.g., Havarti, Provolone, or Swiss cheese)
• 3 tablespoons unsalted butter
• 4 large onions, sliced
• 2 cloves garlic, finely minced
• 1 tablespoon fresh rosemary, chopped (or ½ tablespoon dried rosemary)
• ¼ cup unsalted butter, melted
• 1 teaspoon mustard powder
• 1 teaspoon garlic powder
• 1 tablespoon parsley, chopped (or ½ tablespoon dried parsley)