In the bowl of a stand mixer, combine the yeast, sugar, and warm water. Let sit for 5–10 minutes until foamy.
Add the flour, olive oil, and salt. Mix until a soft, slightly sticky dough forms.
Knead the dough for 6–8 minutes until smooth and elastic.
Transfer the dough to a lightly greased bowl, cover, and let rise for about 45 minutes.
While the dough rises, preheat the oven to 400°F (204°C).
Toss the cherry tomatoes with 1 tablespoon olive oil, salt, and pepper. Roast for about 20 minutes until blistered.
Increase the oven temperature to 475°F (246°C).
In a bowl, whisk together the ricotta, basil, milk, lemon juice, garlic, salt, and pepper until smooth.
Punch down the dough and divide it into two portions.
Roll each piece into a thin oval or rectangle about ¼-inch thick.
Transfer the dough to parchment-lined baking sheets or a pizza stone.
Prick the dough with a fork and brush each with 1 teaspoon olive oil.
Spread the herbed ricotta evenly over each flatbread.
Arrange the zucchini slices and roasted tomatoes over the ricotta.
Sprinkle the crumbled goat cheese evenly on top.
Bake the Zucchini & Herbed Ricotta Flatbread for 15–20 minutes until the crust is golden and the cheese is lightly browned.
Garnish with fresh basil, cracked black pepper, and crushed red pepper flakes if desired. Slice and serve warm.