Paleo barbecue sauce

I wanted to make some pulled pork and most recipes had barbecue sauce in them so I decided to find a good recipe and make some sauce myself. Civilized caveman had a good recipe and I had all the ingredients at home. I only put in the chunks of the pineapple and not the juice since I wanted to save that for a drink later.

Ingredients
makes about 500 ml
1½ tomatoes, diced
½ onion, diced
2 garlic cloves, diced
250-300 g tomato paste
120 ml beef stock
1 tbsp Dijon mustard
1 tbsp apple cider vinegar
½ tbsp olive oil
1 tbsp paprika powder
½ tsp sea salt
½-1 tsp cayenne pepper (all depending on how hot you want it)
230 g can of diced pineapple (without added sugar and other additives)

Combine all ingredients in a medium sized pot and place it over medium heat while stirring frequently. Once the sauce starts to boil, reduce the heat to low. Cover and let it simmer for about 1 hour. Make sure to check it and stir it every now and again so that it doesn't burn. Once the simmering is done, place the sauce in a blender, food processor or use a hand mixer (this is what I did) and run until you have a smooth consistency.