Preheat your oven to 400°F (200°C).
Prepare the potatoes by washing them thoroughly and patting them completely dry with a paper towel. Moisture is the enemy of crispy skin.
Pierce each potato 4-5 times with a fork to allow steam to escape during baking.
Rub each potato generously with olive oil, ensuring they are fully coated, then sprinkle coarse sea salt over the skins.
Place the potatoes directly on the middle oven rack (place a baking sheet on the rack below to catch drips) and bake for 50-60 minutes, or until a knife slides easily into the center.
While the potatoes bake, prepare the beef chili. In a large pot or Dutch oven over medium heat, cook the ground beef and onion until the beef is browned and the onion is soft. Drain excess fat if necessary.
Add the minced garlic, chili powder, and cumin to the pot. Stir constantly for 1 minute until fragrant.
Stir in the kidney beans, crushed tomatoes, and beef broth. Bring the mixture to a boil, then reduce heat to low and simmer uncovered for 20-30 minutes, allowing the chili to thicken.
When the potatoes are done, remove them from the oven. Carefully slice each potato lengthwise, then push the ends towards the center to pop them open.
Fluff the insides with a fork.
Assemble by ladling a generous amount of beef chili over each potato.
Top immediately with shredded cheddar cheese, a dollop of sour cream, green onions, and savory beef bits.