Preheat oven to 375F. Cook hamburger meat and onion. Drain, then add cumin, salt, and pepper. Line the bottom of your pan with whole green chiles (chop extra green chiles for later). Layer meat over green chiles. Top with cheese and chopped green chiles. Whisk together eggs and milk, then add flour and mix well. Pour this mixture over dish. Bake for 35 to 40 minutes. Serve right away while everything is hot and cheese is melted. Yum!