You can get creative with the selected dough as you will need to stretch it to whatever shape best fits your grill. It can be round, oval, or even free-form.
The easiest way to flip a large round of dough on a hot grill is to make it into two smaller pieces and using tongs and a spatula to turn them over.
3 tablespoons olive oil
All-purpose flour, for shaping dough
1 pound store-bought pizza dough, fresh, or thawed if frozen
2 plum tomatoes, thinly sliced crosswise
2 scallions, white and green parts separated, thinly sliced
1 log soft goat cheese, crumbled
1 bag baby spinach
1 avocado, halved, pitted, peeled, and diced
2 tablespoons red-wine vinegar
1. Heat grill to medium. Brush a large rimless baking sheet (or an inverted rimmed sheet) with 1 tablespoon oil. On a lightly floured work surface, roll and stretch dough to two 8-inch ovals or rounds. Transfer to prepared sheet. Brush tops with 1 tablespoon oil.
2. Transfer dough to grill. Cook, without turning over, until undersides are firm and begin to char, 2 to 3 minutes. Using tongs and a large spatula, place crusts on baking sheet, grilled side up.
3. Scatter crusts with tomatoes, scallion whites, and cheese; season with salt and pepper, and slide back onto grill. Cook, rotating occasionally, until cooked through and cheese begins to melt, 3 to 5 minutes. Transfer to a cutting board.
4. In a medium bowl, combine spinach, avocado, scallion greens, vinegar, and remaining tablespoon oil; season with salt and pepper, and toss to combine. Pile mixture onto pizzas; halve, and serve.