Heat broiler on high. Place bell peppers on a baking sheet and roast until charred, rotating every 8-10 minutes to cook on all sides. Transfer to a bowl and cover immediately to trap steam. Cool until comfortable to handle. Remove the skin from the peppers and cut into strips.
In a large bowl, combine arugula, cherry tomatoes, red onion, and roasted bell peppers. Drizzle olive oil, lemon juice, and season with salt and pepper.
Toss lightly; top with pistachios. Serve.
Recipe by Between Carpools at https://betweencarpools.com/roasted-pepper-arugula-salad/