Preheat oven to 350°F.
In a large skillet, heat olive oil over medium heat.
Sauté onion and bell pepper until softened and translucent.
Add garlic and cook for about 1 minute.
Stir in chili powder and cook until fragrant.
Add chopped rotisserie chicken and stir until evenly coated.
Add Rotel tomatoes and both cans of soup. Stir to combine.
Add torn corn tortillas and stir until fully coated in the sauce.
Remove from heat and stir in half of the shredded cheddar cheese.
Spoon mixture into a greased 9×13 baking dish.
Top with the rest of the cheese.
Bake for 30 minutes, until bubbly and lightly browned on top.
Let cool slightly before serving.