Before starting, preheat the broiler to high. Wash and dry all produce. Core, then cut pepper into 1/4-inch slices. Cut tomato into 1/4-inch pieces.

Heat a large non-stick pan over medium-high heat. When hot, add 1 tbsp oil (dbl for 4 ppl), then sausage and peppers. Cook, stirring and breaking up sausage into smaller pieces, until peppers are tender and sausage is cooked through, 6-8 min.** Season with salt and pepper, to taste.

Meanwhile, arrange flatbreads on a foil-lined baking sheet. Brush with 1/2 tbsp oil. (NOTE: For 4 ppl, use 2 baking sheets, with 1/2 tbsp oil per sheet.) Broil flatbreads in the bottom of the oven until softened, 1-2 min. (NOTE: For 4 ppl, broil one sheet at a time.) (TIP: Keep an eye on them so they don't burn!)

Evenly spread marinara sauce across flatbreads. Top with sausage and pepper mixture, then mozzarella and half the Parmesan. Broil in the middle of the oven until cheese melts, 2-3 min. (NOTE: For 4 ppl, broil one sheet at a time.) (TIP: Keep an eye on them so they don't burn!)

Meanwhile, whisk together vinegar, 1/4 tsp sugar and 1 tbsp oil (dbl both for 4 ppl) in a large bowl. Season with salt and pepper. Add spring mix, tomatoes and remaining Parmesan. Toss to combine.

Cut flatbreads into quarters. Divide flatbreads and salad between plates. Sprinkle chili flakes over top, if desired.