Preheat oven to 350F. Set rack in middle position. Prepare an 8x8 baking dish by spraying with nonstick cooking spray.
Place rice, ¾ teaspoon salt, stock, and lime juice in dish. Cover with foil and bake for 25 minutes.
Meanwhile, in a large nonstick skillet, add oil, onion, bell pepper, and jalapeno. Season with remaining ½ teaspoon salt. Cook over medium-high heat until vegetables are translucent and softened about 5-6 minutes. Add garlic and spices and continue cooking for 1 minute.
Stir in diced tomatoes and tomato paste. Let cook for 2-3 minutes and until just a little liquid remains.
Remove from heat. Fold in corn, black beans, chicken, 2 tablespoons cilantro, ½ cup tortilla chips.
Once rice is par-cooked, remove from oven and pull back foil. Add mixture to rice. Recover with foil and bake for an additional 25-28 minutes.
Once rice is fully cooked, remove from oven and remove the foil. Switch oven to broil. Top casserole with remaining tortilla chips and cheese. Place under broiler, until cheese is melted, about 2-3 minutes.
Remove and let sit for 5 minutes. Garnish with remaining tablespoon of cilantro and serve. Great served with a dollop of sour cream or sliced avocados.