Warm the tortilla so it bends easily
Place the filling in the center
Add a tostada or flat crunchy layer on top of the filling
Add any top toppings on the crunchy layer
Leave enough empty tortilla around the edges
Fold one edge of the tortilla up over the center
Continue folding around the circle, overlapping each section
Keep folding until the filling is fully enclosed
Press the seam side down to hold the fold
Toast or grill the folded side first to seal it