Add cheese to a large aluminum pan or baking pan, 13"X9", set aside
Cook sausage in cast iron pan over medium heat, seasoning with salt and pepper
When meat is almost cooked through, add jalapenos, yellow peppers, garlic and onion, and continue to cook until meat is done
Drain fat from meat mixture and add meat to the cheese cubes and cover with aluminum foil
Heat grill to 300°F and place pan of meat and cheese on the indirect heat.
Let cook for one hour, stirring occasionally, to avoid burning to bottom.
After one hour, add tomatoes and salsa, stir to combine
Cook additional 30 minutes, uncovered, or until the top starts to bubble and all cheese is thoroughly melted and blended
Serve hot with tortilla chips
