Let's talk hot sauce

[PokerBricxjo]

I'm fond of homemade sauces. My fav is steak sauce, I always cook it by myself. Here is recipe: I heat 2 tablespoons olive oil, add onions and cook for 3 to 4 minutes over medium heat. Then, I add smash garlic and saute for 15 seconds. Place 1 cup ketchup + 1/4 cup lemon juice + 1/4 cup white vinegar + 2 tablespoons soy sauce + 2 tablespoons brown sugar + 1 tablespoons mustard + 1 pinch salt and 1 pinch black pepper in saucepan and simmer on low, uncovered for 20 to 25 minutes. The sauce is ready. I order special bottles at spam link removed to keep it in the bridge. I like to add it to meat, taste delicious.

Sounds good, but not necessarily hot, am I missing an ingredient? Where is the spice?