Before starting, preheat the oven to 450°F. Wash and dry all produce. Heat Guide for Step 4 (dbl for 4 ppl): 1/4 tsp mild, 1/2 tsp medium and 1 tsp spicy! Arrange flatbreads on a baking sheet. Toast in the middle of the oven, until golden-brown, 2-3 min per side. Set aside. (NOTE: For 4 ppl, use 2 baking sheets and bake in the middle and the top of oven, rotating sheets halfway through cooking.)

While flatbreads toast, halve tomatoes. Slice the cucumber into 1/4-inch rounds. Core, then thinly slice pepper. Tear mozzarella into bite-sized pieces. Whisk together 1/2 tbsp vinegar, 1 tsp pesto and 1/2 tbsp oil (dbl all for 4 ppl) in a large bowl. Season with salt and pepper. Set aside.

Heat a large non-stick pan over medium-high heat. When hot, add 1/2 tbsp oil (dbl for 4 ppl), then peppers. Cook, stirring often, until tender, 4-6 min. Season with salt and pepper.

Working directly on the baking sheet, spread remaining pesto over each toasted flatbread, then top with peppers and torn mozzarella. Sprinkle 1/4 tsp chili flakes over top. (NOTE: Reference Heat Guide.) Toast assembled flatbreads in the middle of the oven, until cheese melts, 5-6 min. (NOTE: For 4 ppl, bake in the middle and the top of the oven, rotating sheets halfway through cooking.)

Add spinach, cucumbers and tomatoes to the large bowl with the dressing, then toss to coat. Cut flatbreads into quarters. Divide flatbreads and salad between plates.