Tamale Pie

INGREDIENTS

• 3 Tbs. canola oil
• 3 yellow onions, thinly sliced with a mandoline
• 3 large green bell peppers, seeded and chopped
• 3 to 5 serrano chilies, seeded and minced
• 4 1⁄2 lb. ground lean beef
• 4 cups corn kernels, fresh or thawed frozen
• 1⁄4 cup ground cumin
• 4 1⁄2 Tbs. chili powder
• 1 can (14.5 oz.) diced tomatoes, drained
• 1 can (6 oz.) tomato paste
• 3 1⁄2 Tbs. coarse salt, plus more, to taste
• 1 cup chopped fresh cilantro
• 1 box Buckeye corn bread mix
• 1 cup shredded Monterey jack cheese
• Sour cream for serving