While peppers bake, make the Bean Salad. Whisk together vinegar, oil, sugar, cumin, salt, and pepper, stirring to dissolve the sugar.
Add remaining Bean Salad ingredients to a large bowl. Drizzle with the dressing and toss to evenly coat.
Prepare meal prep boxes by placing 1 or 2 stuffed peppers into each container, along with a heaping spoonful of Bean Salad. Store tortilla chips in a separate baggie to keep them fresh. Add sour cream, avocado, and a lime wedge to your boxes if you’d like for added flavor.