My favorite is taking a quart size jar and adding a chopped red onion, 2 to 4 cloves of garlic (depending on size), a sliced roasted red pepper, 2 to 3 anchovies, 3 to 4 tbsp of brown sugar and 1 tsp each of red pepper flakes, cayenne and black pepper. Then fill the jar with some good quality apple cider vinegar (like Braggs) and add salt to taste. Let this mingle in the fridge for a day or two and then remove the solids. Pour the rest into some plastic squeeze bottles to squirt onto your sammiches, or to squirt into your mouth on occasion.