Sausage & Garlic Pesto Flatbread

and 1/2 teaspoons active dry or instant yeast

granulated sugar

warm water

all-purpose flour

olive oil, plus 1 teaspoon for brushing the dough

salt

cooked or uncooked sausage*

homemade pesto*

fresh mozzarella cheese, sliced into 1/4 inch thick slices

sun-dried tomatoes or sliced fresh tomatoes*

optional: crushed red pepper flakes