Skillet Enchiladas Suizas

0 Heat oil in a medium cast-iron skillet over medium heat.
1 Add onion and cook until lightly browned, about 5 minutes.
2 Stir in garlic and cumin; cook 1–2 minutes.
3 Reduce heat to medium-low. Add drained Rotel, chicken, and salsa; simmer 2-4 minutes until slightly thickened.
4 Remove from heat. Stir in sour cream, tortillas, and ½ cup Monterey Jack cheese.
5 Sprinkle remaining cheese over the top.
6 Cover and let melt, or broil briefly until bubbly and golden.
7 Top with avocado and cilantro. Serve hot.