
Combine chopped bell peppers, jalapeno peppers, whole garlic cloves, dill and parsley into a large food processor or blender and pulse to finely chop.
Transfer mixture to medium bowl and add 1/2 cup vinegar, 1/2 cup olive oil, 1/2 cup sugar and 2 1/2 Tbsp salt. Stir to combine.
Cut tomatoes in halves (or quarters if using larger tomatoes), trimming off fibrous stem tops. Layer tomatoes and marinade into large 1 gallon jar, alternating with tomatoes and marinade until jar is full.
Cover with lid and tighten. Turn jar upside-down, placing it over a plate to catch any leaks. Refrigerate up-side-down 12 hours (*see note). After 12 hours, flip the jar right side-up and enjoy! Refrigerate remaining tomatoes keeping jar right-side-up.