Homemade BBQ Sauce

Heat oil in a medium saucepan over medium heat until shimmering.

Add the finely chopped onion and cook, stirring occasionally, until softened and translucent, about 3-4 minutes.

Stir in the chopped fresh garlic and cook for 1 minute until fragrant.

Pour in the tomato ketchup, prepared mustard, dried thyme, vinegar, and chopped celery leaves.

Stir well to combine all ingredients thoroughly.

Reduce heat to medium-low and simmer for 10 minutes, stirring occasionally, to allow flavors to meld and the sauce to thicken slightly.

Taste and adjust seasonings as needed, adding more vinegar for tang or thyme for depth if desired.

Remove from heat and let cool slightly before serving or transferring to storage containers.