In a skillet, cook ground chuck and break into pieces until browned, 5-7 minutes. Add onion and bell pepper; cook until softened, about 4 minutes.
STEP 3
Stir in stock, kidney beans, diced tomatoes, corn, taco seasoning, chipotle chile, and adobo sauce. Bring to a boil, then simmer until thickened, 7-10 minutes. Stir in 1 cup of Cheddar.
STEP 4
Transfer mixture to a baking dish. Top with remaining Cheddar and corn chips.
STEP 5
Bake uncovered until bubbly and cheese is melted, 18-20 minutes. Let rest 10 minutes. Garnish with scallions and serve with sour cream, guacamole, and salsa.