Looks like 12-20oz of peppers right there. I'd chop em and add about 3/4 cup of vinegar, 1 tsp to 1 TBSP minced garlic (to taste), 1 sweet apple or very ripe pear and maybe 1/2 an onion (all chopped) and 1 tsp salt to a stock pot. bring to a boil and reduce heat to low. simmer for at least 20 mins. transfer to blender or boat motor the living dead out of it. remove from heat and put the whole batch through the fine screen of a food mill. taste and adjust as necessary. reheat/blend again/bottle. let age at least 2 weeks.
watermelon might work too. I'd likely reduce the vinegar or increase initial cook down time to counter the extra liquid.