Spicy Sausage, Bean, and Cheese Nachos

INGREDIENTS

• 1 pound fresh hot pork sausage (casings removed), crumbled
• 4 scallions, white and green parts separated and chopped
• 1 tablespoon chopped garlic
• 2 cans (15 ounces each) pinto or black beans, rinsed and drained
• 3/4 cup low-sodium chicken broth or water
• 1/2 teaspoon chili powder
• 1/4 teaspoon ground cumin
• 1/4 teaspoon coarse salt
• 12 ounces large tortilla chips (restaurant style)
• 3 cups grated pepper Jack, sharp cheddar, or a combination
• 1/4 cup pickled jalapeno slices (optional)
• Salsa and sour cream, for serving