Clean and sterilize 2 quart-size canning jars with lids.
Add the vinegar, sugar, salt, cloves, mustard seeds, peppercorns, mustard, turmeric, red pepper flakes and bay leaf to a large saucepan over medium heat. Bring to a simmer and cook, stirring occasionally, until the sugar dissolves and the flavors start to marry, about 5 minutes.
Add the green tomatoes, green and red bell peppers, onion and cabbage and bring to a boil, lower the heat and let simmer, stirring occasionally, for 15 to 20 minutes. Remove from heat. Divide the mixture between the two jars and let cool to room temperature. Serve immediately or seal and refrigerate for up to 6 weeks.