How to make sweet and sour sauce at home. Easy, quick and delicious!

Ingredients:
Peppers - 1/2 pcs.
Pepperoni - 1 pc.
Garlic - 3-5 cloves
Water - 20 g.
Salt - 1/2 tsp
Sugar - 100 g.
Rice vinegar - 100 g.
Cornstarch – 1/2 tbsp.
Water - 50 g.
This amount of ingredients will yield 300 g of sauce.