Spicy Jalapeno Sliders

INGREDIENTS

• 1/2 teaspoon cracked black pepper, plus pinch
• 1 cup creme fraiche
• 1/4 cup store-bought salsa verde
• 1/2 cup panko bread crumbs
• Pinch garlic powder
• 1/4 cup grated spicy Monterey Jack cheese
• 2 jalapenos, seeded and diced fine, plus whole or sliced, for serving
• 1/4 cup heavy cream
• 1 pound ground beef
• 12 mini dinner rolls
• 2 shallots, chopped fine
• Kosher salt