Preheat oven to 350 degrees.
First, mix the Tex-Mex spice blend ingredients in a small bowl. Set aside.
Heat a large wok or pan on medium and add the onion, garlic, bell pepper, green beans, mushrooms, and vegetable broth. Saute until veggies are soft and tender. Add a little more vegetable broth if veggies start to dry up. Season with sea salt and ground black pepper.
Add the corn, diced tomatoes, tomato sauce, chopped kale, black beans, brown rice, and the Tex-Mex spice blend. Stir for a few minutes until well combined and heated.
Pour mixture into a 9×13 casserole dish and smooth out the top. Sprinkle the crushed corn tortilla chips on top and cover the pan with foil. Bake in the oven for 15 minutes.
Uncover the casserole dish and cook for 5 to 10 minutes more, until bubbly and lightly golden around the edges.
Scoop the casserole into bowls and add your desired toppings. Enjoy!