Preheat broiler with oven rack in upper middle
Heat oil in a large cast-iron skillet over medium-
high. Add 1/2 cup onion and jalapeño to pan; sauté
4 minutes or until tender. Add flour, cumin, and
chili powder; cook 1 minute, stirring constantly.
Add stock; bring to a boil. Reduce heat to medium,
and stir in crumbled beef patties and beans; cook
2 minutes. Stir in mozzarella; cook 1 minute or
until cheese is melted. Remove pan from heat.
Sprinkle Mexican-blend cheese over pan; broil 1
minute or until cheese is melted. Sprinkle
remaining 1/4 cup red onion, tomato, and avocado
over pan. Serve with chips.