Preheat oven to 400 degrees.
In a large skillet over medium-high heat, brown ground beef. Season with salt, stirring to break up beef into bite-sized pieces. Once browned, add cumin and chili powder. Stir for one minute.
Add beans, tomatoes and salsa.
Heat until bubbly. Remove from heat and top with cheddar cheese and cornbread mix.
Place in oven and bake for 20 minutes, or until a toothpick inserted in the middle of the cornbread comes out clean. Remove from oven and serve.