Chiles Rellenos Casserole

Ingredients

• 1 lb. ground beef
• 1/2 c. chopped onion
• 1/2 tsp. salt
• 1/4 tsp. pepper
• 2 (4 oz.) cans whole green chiles, cut in half lengthwise and seeded, divided
• 1 1/2 c. (6 oz.) shredded medium Cheddar cheese
• 1/4 c. all-purpose flour
• 1/4 c. milk
• 4 eggs. beaten
• 1 1/4 c. milk
• 4 dashes of hot sauce
• 1/2 tsp. salt
• dash of pepper