In a large skillet set over medium-high heat, brown the ground beef with the onion, jalapeño, and garlic until no pink remains.: The pan will hiss as the ground beef hits the surface, releasing savory aromas and creating little brown bits that smell deeply roasted. As the onion softens and the jalapeño gives off a green, peppery scent, the mixture will lighten and then darken as it sears. This browning is critical because those caramelized bits dissolve back into the sauce, boosting umami and complexity. Stir occasionally to ensure even color, and break the meat into bite sized pieces with your spoon so you get both crisp edges and tender sections. A common mistake is crowding the pan, which causes steaming and prevents browning, so use a wide skillet and give the meat room.
Drain any excess fat and return the mixture to the skillet on the stovetop.: When you drain, you will notice the pan becomes less loud and the aroma shifts from heavy fat to a cleaner savory scent. Returning the mixture allows you to continue building flavor without greasy heaviness, which helps the sauce thicken properly. Scrape the bottom of the skillet to lift any stuck bits into the meat, those pieces add concentrated flavor. Be careful not to pour off so much that the pan becomes dry, you still want a little fat to carry the flavors. A common oversight is leaving too much fat, which can make the final chili oily, so drain judiciously.
Stir in the beans, diced tomatoes, tomato sauce, broth, tomato paste, chili powder, Worcestershire sauce, salt, and pepper.: As you add each liquid, you will see a glossy sheen form and a fragrant steam rise. The tomato paste will sink in then bloom, and the aroma will shift to a richer, tangy note. Stirring integrates all the seasonings, so take a moment to mix until the color is uniform and the sauce looks cohesive. This combination balances texture and flavor, the kidney beans soften and the diced tomatoes add bursts of acidity. One pitfall is adding spices unevenly, so measure and stir promptly to avoid pockets of overly spicy or salty flavor.
Bring the mixture to a boil, reduce the heat, and simmer for 30-40 minutes until thickened, stirring occasionally.: You will see the mixture bubble confidently at first, then settle into a gentle simmer where small, regular bubbles rise. During simmering, flavors concentrate, liquids evaporate, and the sauce becomes spoonable. The sound changes from a brisk boil to a soft simmer, and the scent deepens into a slow roasted tomato character. Stirring occasionally prevents sticking and allows steam to escape evenly, which helps the chili reduce. A common error is simmering too high, which can scorch the bottom, so lower the heat to maintain a steady, gentle bubble.
Meanwhile cook the fries your favorite way—fry, air fry, or bake them.: The method you choose changes the sensory outcome. Frying yields loud sizzles and a golden, blistered surface that crunches satisfyingly. Air frying produces a clean, hot airflow that crisps with less oil, and baking gives a more even, slightly drier crisp. Whatever route you take aim for a hot, crisp exterior and a tender interior, because that contrast is what the chili will cling to. Avoid overcrowding the fryer or sheet, which causes steam and sogginess, and keep an eye on color because overbaked fries can become dry instead of crisp.
Pile the hot fries onto one large, or several smaller, serving plate(s). Sprinkle with cheddar cheese, then ladle on the hot chili. Top with additional cheese, sour cream, and green onions.: Assemble while the fries are piping hot so the shredded cheddar cheese melts into gooey ribbons, and the chili clings to the fries instead of pooling. You should hear a soft sizzle as the hot chili meets the fries, and see the cheese begin to shine and stretch. Spoon the chili in a few places rather than drowning the fries, that keeps pockets of crispness exposed. A common mistake is letting the fries cool before assembling, which makes the cheese less likely to melt and results in a limp texture.
Top with additional cheese, sour cream, and green onions: The final layering adds creaminess, tang, and freshness. Dollops of sour cream cool the palate, while extra cheddar cheese brings a melted, indulgent finish. Sprinkle the chopped green onions last for a snap of color and a bright, oniony lift. These toppings create textural and temperature contrasts that make each bite interesting. Avoid adding cold toppings too early, since they can cool the dish too quickly; add them right before serving for the best effect.