Ingredients

• 1 tablespoon neutral oil (like avocado oil or vegetable oil), plus more to grease pan
  
• 1 pound sweet Italian sausage, uncased
  
• 1 ¹/₃ cups minced shallot (from about 2 large or 3 medium shallots)
  
• 1 jalapeño, minced (optional)
  
• 1 ¹/₃ chopped scallions, green and white parts divided
  
• 8 large eggs
  
• 1 cup whole milk
  
• 1 teaspoon kosher salt, plus more as needed (I use Morton; you can scale up to 1 3/4 or 2 teaspoons if you use Diamond Crystal)
  
• ¹/₄ teaspoon freshly ground black pepper, plus more as needed
  
• 2 cups shredded melty cheese (such as cheddar, Gouda, or Monterey Jack), divided
  
• 1 (30-ounce) bag frozen shredded hash browns (unthawed), divided
  
• 2 tablespoons finely chopped chives
  
• 2 tablespoons finely chopped basil
  
• 1 cup crème fraîche
  
• Sriracha, chile-garlic sauce, or another thick hot sauce for serving