Chile Relleno Casserole

Ingredients

• pound ground hot sausage
• chopped yellow onion
• teaspoons ground cumin
• teaspoon fine salt, divided
• teaspoons freshly ground black pepper
• unsalted butter, for greasing
• can whole poblano peppers, drained
• shredded cheddar cheese
• all-purpose flour
• whole milk
• large eggs, beaten