Preheat the oven to 425° F. Set flatbreads on a large rimmed baking sheet.
2 flatbread crusts
Set a skillet over medium-high heat. When hot, add the sausage. Cook for 4-5 minutes, breaking it apart into small crumbles as you go, until it's well-browned and cooked through. Remove to a paper towel-lined plate and set aside.
4-6 ounces crumbled Italian sausage
While the sausage cooks, gather your other ingredients. Spoon and swirl a thin layer of pesto over each flatbread, and sprinkle the mozzarella over the pesto.
1 cup basil pesto, 2 cups shredded mozzarella cheese
Dot each flatbread with the cooked sausage crumbles and the sun-dried tomatoes. Sprinkle Parmesan lightly on top.
2-3 Tablespoons sun-dried tomatoes, 1-2 Tablespoons Parmesan cheese
Transfer to the oven and bake for 9-12 minutes, until the cheese is melted and bubbling in spots.
Remove flatbreads from the oven. Sprinkle with red pepper flakes and fresh basil, if desired. Slice and enjoy!
red pepper flakes and fresh basil