Preheat the oven to 400°F (200°C). Pierce each potato several times with a fork and place them on a baking sheet. Bake for 45 minutes or until tender.

In a skillet over medium heat, brown the ground beef until fully cooked. Drain excess fat.

Add taco seasoning and water to the skillet. Stir to combine and simmer for 5 minutes until thickened.

Once the potatoes are cooked, remove them from the oven and let cool slightly. Cut a slit down the center of each potato.

Spoon the taco filling into each potato, top with shredded cheese, and return to the oven for 5 minutes or until cheese is melted.

Serve topped with sour cream, lettuce, diced tomato, and jalapeño slices.