Place the sweet potato slabs on your toaster oven’s baking sheet, and toast on high until soft. It may take 4 to 6 rounds of toasting. Note: if you don’t have a toaster oven, or you’re making sweet potato toast for the whole family, you can bake the slabs in the oven at 400 F for 25 to 30 minutes, flipping halfway through.

Remove the sweet potatoes from the toaster oven. Spoon the pasta sauce over them, and sprinkle or layer on the fresh mozzarella.

Return the sweet potatoes to the toaster oven (or oven), and bake until the cheese is melty and starting to bubble, about 5 minutes.

Transfer the sweet potatoes to plates, garnish with fresh herbs and serve.