Sofrito - the base for Paella

I plan to cook for my sis and her family tomorrow evening.
While making Paella, most people just sauté the vegetables and then add the rest (meat, seafood, wine, stock, rice, etc).
Me... don't mind going through all the trouble to make the paella base 'sofrito'.
The making of sofrito takes time! Say... half an hour, at least.
But it adds sophisticated flavor to paella dish.
Sofrito is a combination of aromatic ingredients diced and sautéed at low heat for 30-60 minutes to form a 'jam-like' paste.
Sofrito normally consists of garlic, onion, capsicum, tomato, thyme and olive oil.

Here is how I do it:
Step 1: dice the vegetables
Step 2: sauté the veggies to release their sweetness and flavor
Step 3: add herbs such as thyme, parsley, rosemary and etc
Step 4: simmer at low heat and check up on them every 5-10 minutes with gentle stir in case it gets burnt.
Step 5: fridge and it will be good for 3-5 days

I also marinate the chicken overnight (spices like garlic, paprika, saffron, tomato powder, olive oil)