Heat the olive oil in a pan over medium-high heat. Add the onions, cooking until lightly browned, about 5 minutes. Add the beef, cooking until browned and cooked through.
Stir in the rest of the ingredients through salt and pepper. Cook until slightly thickened, 5-10 minutes. Remove from heat.
Preheat the broiler. While broiler is preheating, grill hot dogs.
Open the hot dog buns and lay flat, cut side up, on a baking sheet, as many as will fit. Place under broiler until lightly toasted (1 minute). Remove from oven, lower heat to 400F.
Add a hot dog to each bun, top with chili sauce and cheese. Return to the oven, cooking until the cheese has melted and the hot dogs are warmed through, a few minutes.
Top with red onion and cilantro. Serve immediately.
Recipe by Tonja's Table at https://tonjastable.com/2021/06/4th-of-july-tonjas-table-chili-dogs/