Wash and scrub the russet potatoes thoroughly. Cut them into fries (about 1/4 inch thick).
In a large bowl, toss the cut fries with olive oil, salt, and pepper until evenly coated.
Spread the fries in a single layer on a baking sheet lined with parchment paper. Bake for 30-35 minutes, flipping halfway through, until golden and crispy.
While the fries are baking, heat the chili in a saucepan over medium heat until warm.
Once the fries are crispy, remove them from the oven and sprinkle them with shredded cheddar cheese. Return to the oven for an additional 5-7 minutes, or until the cheese has melted and is bubbly.
Remove the loaded fries from the oven and top them generously with heated chili.
Add dollops of sour cream, sliced jalapeños, and chopped red onion on top for an extra kick.
Garnish with fresh cilantro if desired. Serve immediately.